Just when you think you've invented the perfect useless machine ...

It turns on you....

More like this

The real trick is to have a graduate student operate the machine 1000 times, documenting every attempt in his lab book - then let the machine run away at 999.

IIRC, a similarly infuriating machine was described in an early New Scientist, in the late 60s (it had a hand that popped out).

By Richard Simons (not verified) on 01 Sep 2011 #permalink