Our company did something particularly heinous (well, we must have according to our CC). We got marched to our barracks after chow & fell out to the parade grounds with full sea bags. The object was to throw your bag as far as physically possible & then lay down and roll up to it. Get up and throw again/roll again - this kept up until at least half of the company puked (in your uniform of course) - can't foul the parade grounds.