The frist thing I thought of was a machine that immediately turns itself off .. win. That thing is great.
wait...you saw my old packard bell?
History of this machine:
Here is the original, it is clear so pretty cool.
http://www.youtube.com/watch?v=7bE7U0fHtQ8&feature=player_embedded
Here is the copy, which uses creepy doll arms.
http://www.youtube.com/watch?v=BwasL7sGV6Y&feature=player_embedded
Pre-cursor to Skynet. Pretty cool.
KT