Ahh yes. Reminds me of the obfuscated C competitions. I've seen some C sources like that that were shaped like a train or a whale, which is fun.
Nice example there; interesting use of recursion and the ? operator. I also didn't realise '_' was a legal variable name.
Of course, some languages like Brainf**k, Perl and my own
"Bonk" are pretty obfuscated as a matter of course :-D