Crab Fighting

The modern solution to an argument.
No bloody violence (possibly some groinal pain.)
No weapons.
Can be done pretty much any time, anywhere with anyone.

Simply sit on your hands and knees with your stomach facing the sky/roof. Only your hands/knees can touch the ground.

Use your knees/legs/feet to attack the other person. The aim is to get their ass on the floor. The first person with their ass on the floor loses.