When my brother was in law school there was a case they read about--this was years ago, so I probably have gotten the details mixed up--

There is some damage to a residential street-(bumpy surface or pothole or whatever)--a guy crashes his motorcycle in the street in front of his house because of the damage. He is not seriously injured from the crash. His girlfriend cleans up gasoline from the crash and puts the gasoline soaked rags in the toilet. The fellow sits to use the toilet, lights a cigarette, and drops the match into the toilet, thus igniting the gasoline soaked rags and causing serious burns to his backside.

The legal question was if the city was responsible for the burns to this fellow's bum because of failure to maintain the surface of the street.

The other thing we used to discuss quite a lot in those days was how they got the stripes into the toothpaste tube so that they would come out right on your toothbrush.