Damien has done crazier stuff; I heard a conference talk and thought "Like seeing Cthulhu, it might be something human minds can't handle!".

Conway has written Parse::RecDescent, the eminent "Best Practices" book (which imho should be mandatory reading for Perl programmers). And so on.

The guy is incredible.

Edit: Updated for clarity. On consideration -- he has done other things, equally crazy. But probably not crazier. :-) Most famous is probably http://search.cpan.org/~dconway/Acme-Bleach/

Hey, if you can't have fun, go join some language community that always vote up language war insults on other communities...