It's a Webkit thing, has to be a Webkit-based browser. Alas, as I have Opera and only Opera this particular phenomena shall pass me by. Also, if the barrel roll thing works, try typing 'askew' into Google, that one's amusing. Also, 'Recursion' (although that one may go over the head of most non-programmers).
I just typed in do a double back flip with a half tucked twist and guess what......Nothing, oh well they haven't got round to that one yet.