My fifth grade teacher used to yell, but only when I would return from going to the bathroom. She was tired of me relieving myself and not coming straight back into the room. I used to get a drink right after my pee. The next time I had to go to the bathroom I asked her if I could get a drink first, then go to the bathroom.
She wasnt too thrilled about that idea. She yelled at me again.
I thought it was a creative solution to a problem that troubled me;)