Seriously, most flaccid penises..seses (however you say for more than one penis) are about 1.5 to 2 inches (flaccid, for our age like 13-15). HOWEVER, the fact that people where watching you (were girls there?) it could have felt "exciting" (see exhibitionism) and caused you to become semi-aroused. What I'm saying is, you might've just gotten "heavy dick". That's the layman's term for a penis that is not quite flaccid, yet not quite erect either (you know, when it starts to get bigger and hand lower before getting hard and becoming erect). I hope that's a long enough answer!