Krav is pretty cool, more of a combat rip your eyes out sort of martial art than a sport. We do something like your puke drills in Judo too, it's called shark bait. Basically you fight one person after another without stopping. As your fighting one guy, the next guy will come up and get the best position he can before the other guy has even left the fight so you have no chance to rest or even start equal. This goes on for 5 or 6 minutes than you rotate the bait.
