Philosophical Jokes

I did like the philosophical jokes on David Chalmers site which David Weinberger pointed to (and provided by Gary Stock of unblinking) . I hadn't seen it before, although visiting the site many times to understand Chalmers' ideas on consciousness. My favourite philosophical joke is this one (though it may be well known to philosophers...?)

"I will always remember the day Rene Decartes died. We had just finished a wonderful meal and were sitting around plotting our next move over coffee. The waitress came up and asked, "More Coffee?" Decartes replied, "I think not." And just disappeared right before my eyes."