I remember once while playing dodgeball I wasn't paying attention to my surroundings and when a ball came towards me I jumped back and fell into a fire exit door which open and I almost fell down a flight of stairs
Seriously, why not left kids get out their energy and frustration throwing some dodge balls... but for a safer time, I use to love those yarn snow balls. They could fly pretty far, but didn't mess anybody up.
*maniacal laughter*