there was a 'ninja cat' video that was popular a few months ago. the camera showed a cat standing perfectly still. The camera was slid over behind a wall, and then back, and the cat would have advanced a few feet, but again be standing perfectly still. This was repeated several time until the cat was able to pounce on the camera - and it was one of the funniest videos i'd ever seen...
until
now
Warning: some unsafe language near the end - but that's what brings the funny.
There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors