*Knock knock knock* Penny? *Knock knock knock* Sheldon?

[45100]

Return fire, return fire now! Oh I love the knocking scenes.

[Zvinkii]

@Chitarrista wht episode and season is this?

[Queenofawesome25]

Trolling at it's best X3

[lilbutterflycrystal]

this show is just so funny I love it when he knocks and Penny comes out and knocks on the door it just makes me laugh...

[Haseo560]

I think Sheldon came after that last knock lol

[RubbishFilmsDirector]

Watching this episode right now ;p

[MrTitania64]

BEST DOOR SEX EVER:) I HOPE THEY ENJOYED IT:P

[DaphneSelena]

LOL 

[matruda]

best knock, knock episode ! lol !!

[theclawism]

Almost sounded like they were having an orgy at the end. LOL!

[elly213099]

Smile Like A Boss!! xD

[XxtheboredonexX]

I DEMAND AN INFINITE LOOP!

[nAt02015]

@XxtheboredonexX after the youtube on the link add "repeat"

Problem solved

[cameron2369]

this is so funny:)

[cynder167]

I like how he stops and is like "wtf?"

[woboin]

I like how this is repetitive drivel yet you all laugh hysterically like it's the funniest thing ever written. RIP humour

[fourlokoJoker]

@woboin

Humor is alive and will my friend I laughed pretty hard at your bitchy not so witty misspelled comment. haha

[woboin]

@fourlokoJoker Sigh. Nice job letting everyone on the internet know you didn't know you can spell it as 'humor' or 'humour'. You're a genius. Or, if you prefer, "your a genius"

[BlizzardI3en]

Not funny the first time, or the 3rd time either...

[aerolego]

So funny!

[MineCraftPixelz]

3,000 LIKE!

[Jovan839]

anyone noticed that theres no 0:25 ?

[KatandCareBear]

@Jovan839 ahhh there is no 25 but 25 makes the world go round ahhhhh

[ignac4]

@Jovan839 it is a glitch in the Matrix

[jorie0203]

this is the funniest show ever

[MehNameless]

OH GOD WHAT DID HE WANT?!!! I WANA KNOW!!!!

[djshortcircuit100]

@MehNameless he needed acsess to the freezer at the cheesecake factory

[overthetop96]

,looool what episode is this?

[Rubyblue0910]

I love this show!!!!!!!!!!! ^.^

[KairiMcEwin]

This is so adorable!

[kittyluvsanimefurevr]

infinate lols

[101carito]

I was lmao

[TheNextMrsElric]

sheldon just got pwned

[MsRiley1980]

Sheldon was getting pissed. This is one of my favorite scenes.

[ILuvBillieJoe2004]

When I do the Sheldon knock to my family they roll their eyes

[totalpokemongirl]

I did not see that coming. XD

[HayabusaWill]

Notice he still did it in a multiple of 3.

[LittleMissMadie99]

@omgeeitzkristine it was probably really hard to not laugh

[Omgeeitzkristine]

@LittleMissMadie99 Lol. If i was doing that scene, we would have had to do it like a million times before i stopped laughing xD

[Omgeeitzkristine]

HOW DID SHELDON NOT LAUGH xD?

[MilicaForeverCharmed]

I just love Kaley Cuoco :') ♥

[sprboy20]

The best Knocking sequence by far!

[DinosaurFan88]

Lol Penny's smile at the end.

[AgentDanaScully100]

Lol shelden is just like why is that door talking to me :)

[TheFanofmanythings1]

look at penny coming out with that smug look on her face



[Kiya4ever]

Aw hes so cute.

[Theinsanechiken]

This is just too damn funny!

[VeronicathePhoenix]

I love this one!!! The flash one is my all time favorite knock but this is a close second!

[haviihavii]

what episode is this?!

[SelenaFanAlan]

what episode is this?

[ildr2003]

@SelenaFanAlan

I think last episode of Season 2..

[runningfriar]

Sheldon in the Ball Pit to epic music

watch?v=3qysapj_5jU

[Znyqify]

what episode is this from

[skater8731]

Jajajajajaj It's so funny!!

[anthonytd103]

Look at Sheldon's reaction at 0:04. That is priceless.

[Supersoccerchic]

@anthonytd103 I know, he's like, what the hell? 

[wolfstar741]

LOL Penny looks so proud of herself XD

[xxTheDoorsFanxx]

DOORGASM !!

[KayleeNielsenOffcial]

knock knock knock "PENNY!!!!!!!!!!!!"

[xSGDLF]

ahahhaha i love Sheldon!

[aneeej95]

bazingaa!

[jggal66]

She has previously said she enjoys arguing with him (at the door), 'cause it's "FOREPLAY". So yeah, I'm pretty sure they're implying it's the "BIG-O"!!

[lrohz]

it sounds like: p p p penny...

[memyselfandthisguy1]

Hahaha lol :) love it

[maddiebff22]

listen to this with ur eyes close :3

[Facecracker123]

@maddiebff22 nice lol

[TheReidt69]

what episode is this

[TheGabrielFrota]

Season and episode, please? ><

[glimper9000000]

knock knock knock Penny! knock knock kncok Sheldon!

[jaineblaize]

OMG! This was and still is HILARIOUS!!!! He's such a great actor!

[izuma123]

door sex

[Haseo560]

@izuma123  word!!!!!!

[Oiyuki]

I know knock like this. Only for my sister mind as she's the only person I know who gets it. I also am starting to laugh like sheldon sometimes... Meep.

[TheJuiceinator2500]

I love how Penny has that big old smile on her face after they're done knocking!! :D

[onepiece6ful]

kkkkkkkkkkkk

[anigodess]

i love how when he first does the knock and penny interrupts he just kinda stops and stares at the door for a second, like he has no idea what to do now.

>__<

[TheMyBluntBlade]

@anigodess hahaha so fucking funny hahaha

[OneBrunou]

Which episode is this? ;D

[CaptainRichardReiben]

@OneBrunou It's the last episode of season 2 where Sheldon, Leonard, Raj, and Howard go to the Artic Circle for a research study that could get them famous.

[bemml]

i love how he gets aggressive when she did that ;D

[maritime889]

LOL

[WolfGirl4489]

Me and my best friend do the same thing! xD Our teachers and parents are always like WTF?

[vampirediaries226]

LOL love this video!!!! One of my favorite sheldon knocks:)

[kempita]

he looks like a skard dog u know when u make a noise and she gets skard ha :)

[CaptainRichardReiben]

@emxiie Oh go fuck yourself son.

[district37nl]

i hate those fake background laugs -_-

[grace0987ify]

@district37nl its a live audience... stop stirring errybody up. if u are on youtube searching these kind of videos then you should know that they film with a live audience..

[themousemaster]

@district37nl me too it's like they want to tell you what's funny and what's not, that's why i stopped watching tv because everytime i didn't get the joke or know what the hell was going on as soon as i heard those laughs i lmao automatically it's like programing. i like ranting XD

[wildwill1980]

LOL Penny got him back :)

[czechpaolio]

very nice scene :) thanks to BBT :) always makes me smile :)

[gabrielzara95]

keep pressing 1 and 5 for Sheldon kkk

[LadyRose1985]

Whenever I hear three knocks, I have to say "Penny." It's like "shave and a haircut." I can't stop myself.

[blackserenade24]

close your eyes and just listen to the video lol

[dashbooncheve]

they could of gone forever

[Nnestrana]

hahah love it

[halfvampiregirl100]

Haha she made him knock more than 3 times!!!!!

[ram6m]

24 Sheldons watched this video.

[thisisjustabackupacc]

Sounds like there having sex near the end and reaching climax...lol

[davidproweb]

Knock knock! Who is there?

Sheldon, Sheldon, Sheldon!

[heightzx23]

It sounded like an ORGASM

[babygirlmd15]

@heightzx23 lol i thought that too lol

[megajebus]

@heightzx23 More like... DOORGASM!!! :D

...

[Mr15unknown]

@heightzx23 HA

[Tomasin19]

@heightzx23 I'll never look at this scene the same way again. Thank you very much.

[sanemcelikcim]

@heightzx23 sick but righ xD

[Ferch2910]

Best scene ever

[ocioso252]

jjajjajajja

[mumugamer2006]

Knock Knock?

WHOS THAT KNOCKING AT PENNY'S DOOR?

[Mangofreja97]

<3<3<3<3

[sharrakelly]

GREATEST knock ever...!!!!

[Skittles91000]

Can somone tell me the episode please

[NintendoRick]

@Skittles91000 I believe it's S02E13



[NintendoRick]

@Skittles91000 Season 2 Ep. 7 for sure!

[Skittles91000]

@NintendoRick Thanks a bunch!!

[RumcajsRozbojnik88]

@Skittles91000 It's the last episode of season 2, so it's S02e23

[entwistlesjd]

Sheldon and Penny have the best onscreen chemistry than any other characters in this show.

[TheShinigamiLune]

Knock knock knocking on Penny's Door!

[Stinkfly3]

Try listening to that as a ringtone.

[wildwill1980]

It's just as if Penny said bazinga back to Sheldon when she did this LOL : )

[stefanyna]

hahahah he gets so confused XD

[lanumerodiez10]

Lol I'm Watching That Episode Right NOW !!!!!! Lmao

MaddogC96 Sheldon Wanted Penny To Let Him Go Into Tha Walk-in Freezer At Her Work Cause He Wanted To Practice Being In Tha Cold Since He Accepted To Go To Tha Artic xD

[bigmike5989]

Penny could have done that all night. lol

[friendsweetc]

@bigmike5989 i would of loved to see that happening

[bigmike5989]

@friendsweetc yeah i know

[geraldopcf]

just hilarious

[DisneyClassicsFan]

Love it!!!! Bazinga:)

[Neighbourssuperfan1]

So very funny :)

[Alyumin]

lol :D

[BullCrusher]

what the fuck is this shit

[zedkpea]

@BullCrusher :O bazinga?

[802betty]

I go to the high school Jim Parson went to!!!!! I'm in the very same theatre department he once was in and walk the halls he once walked..... I'M SO HONORED!!! :)

[26DeislerFCB]

i love her smile here

[pumaxxZ1]

what season and episode is this? :D

[GRIMLOCK07]

@pumaxxZ1 It's the 2nd Season Finale Episode 23 The Monopolar Expedition

[Pingijno]

Lol :D

[HamoNesianGurl]

ahahahahahahaha . funny .

[MaddogC96]

what did he want?

[maisymair]

the look of bewilderment on his face is priceless XD i want a Sheldon :(

[MoNsTeRLeTtE990]

@maisymair lol i think he'd be fun at first but drive ya nuts after a while lol

[beCrunchy]

bhaha.. love this scene!

[danger270693]

fuckin lmfao...

whch episode is it ???

[cclementi6]

He knocks four times for leanord!

[krisdrea]

knocking the door 9001 times is win

[iMuzikal1]

BEST KNOCK EVER!!!!!!!!!!!!

I love Sheldon! He never fails to make me lol. thiis almost had me on the floor laughing XD

[Skullkid12349]

@iMuzikal1 the episode where sheldon is sick and everyone tries to avoid him is funny. i saw it tonight and died laughing

[1985browneyedgirl]

Just curious.....would anyone out there still watch this show if:

A. Sheldon left

B. Penny left

OR

C. Sheldon & Penny left

???

[MrSuperTevez]

@1985browneyedgirl Depends. If they could replace Penny with an equally hot girl then yes. Don't think Sheldons replaceable though, even though I hate him hes still funny as f*** at times.

[1985browneyedgirl]

@MrSuperTevez, Hi, thanks for your reply.

Reason i asked is they are my fave two characters and they have the best scenes together.

I think out of the entire cast, Jim Parsons is the breakthrough actor and Sheldon and Penny have great friendship chemistry in a charmingly mismatched way. Great show!

[TheTheLydiakwano]

haaaaaaaaaaaaaaaaaaaaaaaahahah­ahahhahahaha this one makes me laugh so hard... XD

[maisymair]

he looks so baffled when she knocks back like he is thinking

"How does she know its me?" XD

[namaste91]

annoyed my mother with that xD

[ThePersonudunno]

What episode is this?

[MrSFblack]

i can't help but to think is this what it would sound like if they ever got it on lol

[binarynightmare]

I actually love that clip.

[rosamagalhaes1994]

AHAHAHAHAHAHHAAHHAAHHAHAHAHAHH­AHAHAHAHAHHAHHAHAHHAHAHHAHAHAH­HAHAHHAHAHHAHAHAHHAHAHHAHAHHAH­AHAHAHAHAHAHAH

H

[jaivomi]

I can't help wonder how long you'd have to wait by the door for him to knock...!

[zqfan27]

yum his voice is hot xD

[Andersie91]

Saw this episode little over 2 hours ago.  Very good episode

[BlueFlameKirin]

it was Epic...poor sheldon

[RianBarber14]

LOL Pure awesomeness

[patrick30893]

bazinga!!

[WarblerDalton]

I love that 'butter-wouldn't-melt-in-her-m­outh' look on Penny's face when she opens the door!

[tanggirl01]

love this part!!!

[TBBTbazinga]

EXCELLENT!!!!!!!!!!!!!!!!!

[Rigspelt4ever]

which episode is it? i have only seen it once so far :)