Anthrax was my first thought too but when I hear there were two sets I figured it might be to target between them.
I don't know anything about paintballs...can they be filled? How far can they be shot?
Paintballs can be filled with substances besides paint but they aren't aerodynamic and flex during flight. I do remember shooting them farther than I could visually follow but why sneak a gas-powered gun in when a real one is even more compact (and can launch many types of projectiles).
This Shallow-Bowl halftime is not for me. It is a shock to see popular entertainment when you deliberately avoid it most of the time. Some guy I never heard of ripped Janet Jackson's blouse off (part of the act?).