But it does feature a few tributes to Back to the Future, namely Crispin Glover (spot on as a surly one -
armed bellhop whose appendage - ectomy is anticipated all through the eighties flashback), a future birth threatened by the trampling the space - time continuum (aka the butterfly effect, which resident nerd Duke explains ad infinitum) and the dubious lesson that self - empowerment is merely a matter of beating up that bully from the past.