There was a scene where an elevator got rattled by a quake, in which a surreally unrealistic blood-splatter clip-art flew out toward the viewer.
I once saw a made-for-TV move called
Asteroid!, which was a real masterpiece of badness (as you'd expect from any disaster movie whose title is a single noun followed by an exclamation mark). It included the wonderful line: "It hasn't been this quiet since... hell, it's never been this quiet." But the bit that really sticks in my mind was the sound supposedly made by the titular astronomical object as it whizzed through space. Now I can watch and enjoy
Star Wars, say, without getting too hung up on the fact that you can both see and hear the "laser beams" in space, so I'm in no way a fundamentalist about bad physics in films - but what was amazing here is that the sound effect they'd used was
the exact same sound that the Icon of Sin makes as it spawns monsters at you in the final level of Doom II.