Open container, since that is the only arrest I can remember other than minor traffic violations. Some friends and I were at a club in Virginia Beach many years ago. It was so hot inside, we took a break and had some cold beer outside from the cooler in my truck. A cop comes rolling up on a bicycle dressed as a tourist and said we were under arrest. We thought it was someone joking around, so we all started laughing. He didn't think it was so funny though...