In case you guys didn't know what a "Lung" is...
http://www.youtube.com/watch?v=0VnfedRxi0o
http://www.youtube.com/watch?v=qAFHyJb0knM&NR=1
Recently my floormates and I made a lung out of a 2 liter bottle, a plastic bag, ductape, and a socket from a socket wrench. Now since this is all home...