I was raised in a pub and sometimes people look sober but when they stand up they lose control of their legs. They don't even know they're drunk. They are the nice drunks though. Some idiots want a scrap after two pints.
I saw a car passenger on the hard shoulder of the M25 this morning who was throwing up over the barrier. Might have been car sick but I did wonder if NY Eve had anything to do with it.