http://www.youtube.com/user/bluebychoice
Our twin boys crying in unison. They were hungry and my husband was making a bottle for them as fast as he could as I recorded this video. They were crying for no more than 30 seconds. July 31, 2007
Update: Wow, this video was just featured in a skit on the Tonight Show with Jay Leno (5/2/2011 - may 2nd) as Mariah Carey's twins. Pretty funny. They changed the audio, of course.
(note: they were 2 months premature and the doctors recommended swaddling them tightly for comfort)