This video is filmed like an epic movie trailer for a new intramural sport called
Battleship. The objective is to sink your competitors' boats by throwing buckets of water into their canoes. It looks like there is a member of each team with a shield to block some of the water.
Based on a quick Google search, it looks like there are a dozen or so universities with Intramural Battleship. Fun!
What I learned: Intramural sports are as fun as you make them.