leaving your "victim" still motionless and gasping for air.
Several years ago while trying to "race" with my young son that happened to us. Staying clear, we thought, and trying to get a decent start someone comes up from behind (light wind race) yelling "UP, UP, UP" scared the hell out of my son (who was 8) and jammed us up between two other boats and in irons. Its fun being an immobile object on a start line. Couldn't do anything for what seemed like 5 minutes. Finally started moving as the gun for the next fleet was going off. For a casual sailor/racer that decided it for us. Sold the boat and bought something that can carry more refreshments.
Moral, if you don't study the rule book front to back and learn to win at whatever the issue stay off the race course.
Works for me.

Clayton
S27
P.S. Not many will barge a 27' tank.