Replying to IP adress finder

Dose anyone know how to find out some one IP adress? Like on a Fourm page how would you find an IP adress.




'My arm hurts, I think I had a Stroke'
-Some girl in my school

'At least my boy friend didnt finger my ass hole with strawberry shampoo'
- Words siad durring a Bitch fight

'Bagger my ass, its probley just Mill House'
- Homer Simpson

Sluty girl: 'Im so bad that i run with gangs'
Cartman: 'Yea well, I run with Ten Gangs..'
-South park episode