However you want. JUST DO IT!
it might be tough to obtain the piss of a stranger dude
yeah, he doesn't want you to do anything with the piss of a stranger haha
Well... that might become another dare! JK
I muffed up the dare title. "piss OFF a stranger". Ugh.
Go to any public place and find a complete random stranger to walk up and talk to. If you're a good talker and you have the urge to go, by all means let the water come pouring down. It needs to be in video and it can be discreet. There...
Let it flow.
...and run like hell!!!