Drunk people who can't stand up insisting on standing up, even if everyone else is sitting down.
As a disabled wheelchairman, I've noticed that the default setting for you walkers is "stand", to a fault. Fallen down, hurt yourself and there's blood pouring out of your face? "Here, let me help you up... Oh, you're falling down again. Let me help you up."
Also, for something that you people do a lot of your lives, many of you are absolutely shit at standing even when not drunk. When I'm on the bus, I can tell straight away who's going to run into trouble when the bus takes off. It's like they forget their bodies have dimension and mass.