Shout Out: Resident Evil 0

  • Billy's tattoo reads "Mother Love" — like Claire and Chris' jackets, a reference to the title of a Queen song.
  • Billy's alternate outfit might be a Jailhouse Rock reference. It's the same style as what Elvis wears in one scene. But Jailhouse Rock is in black and white, so the color scheme is up in the air.
  • The cargo elevator escape is a shout out to the escape sequence at the end of Aliens.