Weeing doesn't count!
Far too common.
I just came out of Asda and walked by a car with a woman chucking back scoops of Cow and Gate powder!
I thought in my head that can't be right, maybe she's suspicious parenting and testing to see if it's okay.
Saw her doing the same again when I drove off. Just taking scoops and eating them!
What's the strangest thing you've seen someone do in public?