Close enough to a one shot..... Kinda like how warlocks with ram helmet take a shoulder charge without dying. But they get really low health, so it's close enough to a kill right? Anyway.... I personally think it's a brilliant tactic. You get your shot off either way, once the opponent starts to strafe you lead the knife. The average player can't pull it off with any consistency that's for sure. The OP made it look incredibly effortless.