I came across this when I was playing the game, trying to figure out where to go. I've already beaten the game now so don't tell me I don't know where to go. Later in the game, there is a short cutscene where you are stuck under the building in some rubble (I don't want to spoil anything) and there is an invisible pod you are trapped in while in that scene. I simply just found a way to get into that pod before the cutscene, which clips you through the level when you get out. You are unable to move and must type 'kill' in console to restart.