I missed this example of classroom incompetence the first time round, but it could be worth a second look. Actually, part of me feels it's pretty easy to make a fool of yourself in front of lots of people, (I remember my creepy art teacher missing his femoral artery by a millimeter when demonstrating how not to use a stanley knife)...but shooting yourself? That just seems to be pushing it a bit.
(Must admit to being glad my kids aren't in classes like this. )
HT: Key Words