Midchuck: I saw somebody on a bus once with that T-shirt on. I have ever since regretted not asking him "*Not* the one that went down to Hell in a bucket?"

A guy working on the street outside my house, once upon a time, had one with the charming sentiment: No bar too far to drink to you.

Of the ones I own myself, the one that most amuses me shows a professor doing mathematics on a blackboard, and a gangly student, who has stood up, brandishing his fist at him. The caption is "What are you trying to prove?"