Knock on wood is a saying for good luck. I think that started when someone went to someone's door to see if someone was home. "I hope Joe's home, knock on wood!"
Mitch HedbergI don't have a girlfriend. I just know a girl who would get really mad if she heard me say that.
Mitch HedbergI was booked into the Riviera Hotel in Las Vegas with three other comedians. We all were using the Riviera in-house shampoo, so we all had equal shine and bounce.
Mitch Hedberg