• CRC as a pillow. that's genius or sacrilege.﻿

• 1:05 trippy﻿

• It's how a 90+ ton battle ship floats on water.﻿ Not a miracle and good god you would think 30+ years old "students" wouldn't have to make a video. Go get a job fellas now in day's kids are smarter then you.

• My physics teacher did this experiment in class,except he put ketchup packets under his white shirt without the﻿ class knowing. You know what happened

• When it faded out after﻿ the slowmotion bit they replaced the dead guy with someone else

• Did you have trouble finding people to﻿ assist in this video? :-) I understand how the 1000-nail boards spreads the force around. Did you record the experiment w/ nails? Curious how that went... ;-)

• That﻿ was a little Giles Corey for your Aunt Laurie.

• Ahh, okay, it makes sense a bit, out of curiousity (as I'm still learning :) ), what is inertia? I have looked it up but a human explanation I think would be better to help me understand it.

But wait, how did you﻿ apply the first law here? That you did not answer :)

• The hammer certainly applies an external force, and we can see in the high speed footage that the top bed of nails accelerates a bit as a result of this applied force. However if the combination of cinder block and top bed had less inertia (imagine replacing them with a thin sheet of plywood for example), then the resulting acceleration would be a lot﻿ greater and Allen would probably need to go to the hospital.

• Excuse me but what does the first law have to do with anything here?

The first law of motion states that bodies at rest or﻿ constant motion tend to stay at rest or constant motion unless acted on by a resultant force.

I'm seeing a resultant force being applied so I don't understand how Newton's first law is significant here.

• He aimed and missed, haha. Cool﻿ demo!