The less power someone is granted the more they tend to let it get to their head. Some managers do their best to immediate petty tyrants, generally without any actual positive results. Often enough, employees find a way to make them regret it.
A woman was yelled at and “fired” by a manager who insisted that she buy him a new energy drink, only to learn that he actually couldn’t do that. But the damage was done, so she decided to let him manage the restaurant alone for a bit. We reached out to OP via Reddit and will update the story when she gets back to us.