I went to Antioch college and we had this event called Camelot where you set up an outdoor bike course and riders ride the course while everyone else throws shit at the riders and tries to make them fall. You can throw all kinds of stuff like mud, water balloons, food scraps, whatever. You have your favorite riders and so you try to take the other ones down. I thought it might be fun to set something up like that in Portland this summer. Contact me if you are interested.