Question: The scientists of the genetic research lab were first attacked by the Hellknight monster, which was actually the human test subject. Since after the incident the research lab was quarantined and the first Hellknight could have gone nowhere, how is it that the Marine troops didn't encounter the first monster even once when they entered the genetic research lab?
Question: In the end of the movie, why did Reaper grab the BFG? I could see the stock of the gun sticking out from behind him. It had no more ammo left, so what's the point?
Question: What exactly happened to Reaper's parents? I didn't get much from the flashback, and it's almost never mentioned.