You remove the flickering panel and stick your head in. It’s a crawl space. Why do you have to be claustrophobic? Reluctantly you crawl in. The whole time you’re crawling you try to guess what this tunnel is used for. Maybe air ducts? Maybe a matinence tunnel? You reach the end of the small hallway and by now your eyes are adjusted to the low light. You stand up on a cat walk and to your left and right are rows and rows of what seem like huge pistons. At least now you know what that BOOM sound was. Your brain overloads with knew information, you are seeing the innards of an alien space craft. As your walking you’re looking around at everything when you should be watching your feet. You hear a whir like something’s powering up. You notice that you’re walking faster than usual when you look down at your feet. You’re on a conveyor belt. You stay on, to find out where it goes. You see an orange glow at the end of the conveyor belt. As you are about 30 feet away from the glow, you realize it’s a furnace used to power the pistons. You look behind you and see blue glowing pieces of rock. Well, you’re not exactly sure what they are but they look like rocks. That must be fuel of some kind. You see a conveyor belt to your left. It can’t lead to anything much wore than a furnace can it? You jump on and within 30 seconds of doing so a giant piston smashes right in front of you. You look up and see all the other pistons smashing in succession ahead of you. Maybe if you were quick you could dodge-BAM.
While you were thinking a piston came from above and smashed you. You’re lucky I’m not going into detail