If you hit K quickly after the round begins, you will respawn with the doors open still (they do close a few seconds after) and no ammo/kill dummies. If you run past the doors you have to run the entire course since you can’t go back inside, when you get to the final hallway it will start the timer (sometimes the timer starts and you get a .2-3.0 second time dependong on how fast you walk, other times the timer doesn’t start at all and you just get a flat out 1500 score.
Attached video below. My mouse wasn’t working properly while recording so ignore the slow movements 
