One friend and I have a thing going where we try to do a random awkward “handshake”. It has to be improvised and must be different to the ones we have done previously. It’s really funny, especially when it comes naturally and other people are watching.

E.g. Both start, innocently enough, by going for what looks like a classic normal one. But then I target just his little finger while he might go for an inverted (thumb downward) handshake.