So basically by starting lap 2 in war and then throwing an enemy at a war terminal while exiting the level gives you the war terminal in the overworld, allowing you to die there. In a speedrun, if you unlock the pizzaface boss gate and then die after, you'll respawn out of bounds in staff only, allowing you to kill pillar john in the control room and start the crumbling tower of pizza level.
The community seems pretty split on whether this is a fair glitch. I personally think it's sick as hell and should be allowed.
See it used in action here: • Pizza Tower Any% 1:02:48.03 (FWR)
#pizzatower