So the other day I was walking from the sports field with a bag of 100 tennis balls... That's a big bag, but I managed to carry it. However, unbeknownst to me, it was dragging over the ground, and eventually caught on a sharp piece of kerb, and ripped open. All 100 tennis balls falling out, ending up everywhere. Really annoying. I had to get all of them back individually and only retrieved 99 of them. Now the last one... (at this point comes the tricky part. You have to credibly pretend that you don't remember the ending of this joke. Practice this - it's crucial. Sometimes it can help to say all the way at the start 'I'm not entirely sure anymore whether I remember this joke correctly, but I'm sure I'll get into it if I just start telling it'. Then it's more credible If you pretend to have forgotten it. ) The last tennis ball... No wait, let me think. Ah shit I think I don't remember how it went anymore. Oh but wait! I just remembered another one! Let me tell this one - it's a good joke. Maybe I'll remember the other one later. So a man is sitting on the train with his dog. He is sitting across from another man who is smoking a pipe. It annoys him, so he tells him 'excuse me sir, could you please stop smoking, it really bothers me.' the man does not respond at all. After a while the man becomes very annoyed and raises his voice a little: 'sir, could you PLEASE stop smoking your pipe'. Still no reaction. So after a little while, the man loses his temper, grabs the other man's pipe, and throws it out of the window of the moving train. The other man immediately responds by grabbing the dog of the first man, and throwing it out of the window as well. They soon arrive at the next station, and from the distance, the man sees his dog come running. And guess what he has in his mouth? (everybody I ever told this joke responded with: 'the pipe') The 100th tennis ball.