The human body is amazing, never ceases to impress me on the versatility of various bits of it.
I can crack walnuts between my buttocks, crab claws as well, Brazil nuts and lobster claws are tricky though, about 50% success rate with these.
I put this down to being a wicketkeeper and motorcycle despatch rider for many years, my knees are fucked but my buttocks are firm (ask Mrs Willy).
Anyway, what unusual things can you do with your body, or bits of it?
All good things