More about thumb wrestle.
Alright, so go out in public and challenge strangers to a thumb wrestling match. Simple enough, right?
You gotta lose though, no exceptions.
You gotta lose and either:
a) act a fool like 'oh! i think you broke my thumb! the hell?' etc.
b) be a sore loser...accuse them of cheating, go on and on about how it wasn't fair, etc.