Money doesn't grow on trees, but we often spend it as if it does. Some purchases are actually worth it in the long run, but a lot of times they aren't.
Some criminals just don't think. Most people come up with crazy plans to get away with their misdeeds, while others are just not suited for a life of crime.
All teachers have had to deal with nightmare students in the classroom. You know, the ones that constantly interrupt class and are not afraid to talk back.