What are some weird fighter tics/habits you’ve noticed during their fights?

I’m not talking about techniques or skills, just weird things they do for no clear reason. Here are some I’ve picked up on:

Dustin Poirier constantly pulling up his shorts

Nick Diaz constantly wiping his hands on his shorts

Kelvin Gastelum swaying his arms upwards in a circle after throwing a combo or dodging strikes. Kamaru Usman does this too, usually in the beginning of his fights but he does smaller circles

Donald Cerrone constantly rocking his arms back and tapping his forehead, chest and face with his hands. It’s hard to explain but you’ll know it if you see it, he does it all the time.