I think I may have found a way to get a sub 3, maybe even a sub 2 if you get REALLY lucky. if you shoot the shotgun at the barrel point blank, the bullets will spawn inside the barrel, causing the game to act as if the explosion was set off 7 or 8 times. this can do the equivalent of instantly teleporting you, but its REALLY hard to aim, even when taking your time. Figured i'd mention it though