Some of the sub-missions are quite daft. I was robbing a bank in order to get into a criminal gang, and one of the tasks I had to perform was to clean the floors.
This was just a little daft, and also rather frustrating as it wasn't obvious what I had to do next - I was running around the inside of the bank worried that the police were going to turn up, when in fact I should have been getting onto the automatic mop. It controlled like a pig, too.