The troll dad
Alright, we see this as a somewhat jerky troll act done by a father to his kids. Filling glasses of water and placing them upside down on the kitchen countertop is going to lead to a huge spill. However, if there’s nothing in the glasses, then who’s he trying to tempt into putting the glasses upright?
At least, we hope that this is a kitchen countertop and not a restaurant table. Cleaning up the messes of gross patrons is one thing, but if your parents make a mess for poops and giggles, knowing full-well that you have to clean it up? The thought alone angers our blood!