I do not understand why people aren't satisfied with the uppermost (open) case of whatever when there's a large stack (and, let's face it--everything is stacked at Costco). I watch them struggle to lift 4 or 5 cases so they can pick one box of raisins from the 5th level down. I get if there was one left on top that was crushed or some other moron opened...but, really?

The other one is the family of 5 that walk next to each other (think front line of an NFL team) while pushing the cart as slowly as possible down the 'wrong' side of the aisle.