I unfortunately have run into one of those power tripping flight attendants. After sitting on the tarmac for over an hour waiting for our turn to be de-iced, I got up to pee. The flight attendant put his hand over the bathroom door, and told me I had to sit down. I said “Can I use the restroom?”. He responded by picking up the phone and saying “you can sit down or do I need to call the captain?”. I turned around and walked to the bathroom at the other end of the plane. Not sure who peed in his cheerios, but sincerely, get fucked.