When the fox gnaws, smile!
There's a scene in the Monty Python movie, And Now for Something Completely Different, where the WWII British Army is working on a joke so funny that soldiers who hear it will immediately die laughing (of course, they're working on the version in German ....). Well, my guess is that someday there will be an email that is so funny the entire Internet will crash because everyone will be forwarding copies to all of their friends. I hope I get my copy before the 'Net goes down. These aren't quite that good, but they're goodies.