Jumping, IMO, is the most sure-fire method if you jump from high enough. That's the key. There's really no room for error as long as it's way high. It's not like a giant bird is going to magically swoop in and pick you up right before you hit the ground. Someone mentioned landing on your head but that's not even necessary. And yeah I'd have to be preeettttttyyy drunk to get up the gumption to jump though.