A joke is not a thing but a process, a trick you play on the listener's mind. You start him off toward a plausible goal, and then by a sudden twist you land him nowhere at all or just where he didn't expect to go.
“I cook everything. I love Mediterranean cooking, I love Asian cooking. I do lots of Japanese noodles.”
“This was almost two hours of factual documentary. In our audience ratings, barely no one left the programme. The whole of his life is so fascinating and people kept watching for that reason.”