I am not the man(1) system

Actual occurrence, just five minutes ago:

Butch: JM, what's the purpose of -a in git-commit?
Me: Uh, it's like this. (Then I begin to explain in terms of svn commit and the git index)

Pause.

Me: You did not just use me as a man page.

Previously: Desktop Environments, continued; and a bit of House