Continuity mistake: Susan crushes a chair under her foot when she first meets the rest of the monsters. But moments later, the crushed chair by the table is gone, with two perfectly good chairs right next to it.
Other mistake: There is a shot of a random newspaper blowing around in the middle of San Francisco. But the paper is from New York, with headlines about New York.
Continuity mistake: The man running up to the door for the joke about having to have so many things scanned, shows separate scanners being used for his hand, both elbows, tongue, butt, etc. When he's running up to the door, it shows there is only one scanner. But there are multiple in the same spot as the door opens for him.
Answer: Axel F by Harold Faltermeyer, which was originally used in the movie Beverly Hills Cop.
Casual Person