I bounce on my bed at home all the time. Mostly I bounce off it onto the floor. I don't jump up and down though... I'm too tall for that now, unfortunately.
I can't really bounce on my bed here when I'm at school, since I sleep on an air mattress.
Aside: Yes, an air mattress. Highly portable for one such as myself who has to drive across the country twice a year.
-Tamerlain