Amazingly there's things even the Chuck Norris of programming doesn't know:

http://stackoverflow.com/users/22656/jon-skeet?tab=questions

He's only asked 39 questions (about one for every 1000 answers), but I'm charmed by the fact that they're real questions, usually not particularly esoteric or "advanced". Turns out even Jon Skeet needs to ask how to "efficiently fetch a Mercurial change log in TeamCity."