In the underground garage scene with Russ, Rusty and Janet, Rusty's hair is combed straight down and very neat when he comes out from behind the pillar. When Janet says, "I should have worn my magic bra and panties.", Rusty starts laughing and his hair is messed up. But then when Rusty is snapping his seat belt as he's sitting in the Porsche, his hair is back to being neat.
Daniel von Bargen plays Bruce Willis' father in the movie, even though in real life he's only five years older than Willis.