A referee was injured in Bangor, Maine at the Maine Maritime Academy when a cannon was set off in the on Saturday, September 26th 2019. The blast hit the referee in the head (bottom right of the video). There is a tradition at the Academy of shooting off a blank round from a cannon after each score, the alumnus who brought the cannon left a wad of packing material in the cannon which is what you see hit the referee.
YES. Somebody brought THEIR OWN CANNON to the homecoming game! Talk about audience participation.
Wisely? The school has banned people from bringing cannons to future games.