29: Honking and Waving
You should honk and wave at someone, right? That is at least what this driver thought when he saw that his cousin was pulled over. He was surprised to find out that the cop turned right around and pulled him over. When he asked if it was due to the honking and waving, the police officer said no (via Reddit).
It was because there was no front plate on the vehicle. In most states, you must have a front plate on the vehicle so this driver was shocked, to say the least.