Arrogant customer of the week award.
Our coffee machines are automated touch screens. During the cleaning cycle a tablet is dropped in and dissolves in the water that is run through the pipes to clean them. This takes 6 minutes of running water to clean out completely. The screen displays a timer until it's finished.
Right as this begins a lady comes in and goes up to the machines. Grabs a cup and discovers she can't select the coffee she wants.
She asks me if they're down and I say yes. She throws the cup on the ground and says "you need to put a fucking sign up instead of just standing there" and walks out the door.
Which is weird because the screen tells you it's cleaning and for how long. That counts as a sign, right?