Happened to me yesterday. Closing at work, new guy and I have to clean the bathrooms. New guy says to me, "You know how to do this, right?" And I had to physically force myself to not stare at him like he had three heads.
Buddy, I've been here almost a year now. Not to mention, I spent nearly a year as a hotel housekeeper before this. I think I know not just how to clean a bathroom, but how to make it look like it's never even been used before.
He's a good guy for the most part, but his tendency to be incredibly stubborn and a huge know-it-all has not earned him a whole lot of fans.