I know its not very PC, but I always used to like a pitch invasion at the football. No need for violence, just run on celebrate and run off. Sadly it's not seen much these days, so hats off to these couple of fans, who did'nt let their wheel chair needs get in the way of a pitch invasion. The second one's Dad was'nt too understanding though.
http://www.youtube.com/watch?v=SOZWFbT_E_0
http://www.youtube.com/watch?v=0DcrIGWbQKM&NR=1