Originally posted by: ADigitalMan
Or explosions going "boom" in space in Star Wars ...

The ship computer synthesises explosions for the benefit of the pilot.

Here's one I've wondered about. In "Innerspace", how does Dennis Quaid drink the alcohol, or the shrunken bad guys breath? The body works by elements and particles being a particular size, as so to pass through membranes or join other chemicals.

Yeah. Any time a character is shrunk there are a lot of scientific problems. WHere does the matter go? If their atoms are simply compressed, then the would retain the same weight. Matter can't be destroyed, and if it was converted into energy, there would be a big boom. So how do you shrink something without magic or other planes of reality being involved? It's impossible for science alone to explain that one.