I was just finishing up at a cash in Zellers, during a quiet time in store. This guy comes in holding on to a large wooden rack, or collapse shelving unit or something, and his baby (who was asleep). His baby is in one of those seats that then latches into the base of a car seat, so you can remove it easily. Those things with a kid in it can get heavy, and are awkward to carry, so I felt for him. His problem was that the wood in one of the things he had just bought was broken, so he wanted to exchange it.

He tells the cashier "I'm just going to leave him here with you while I go get a new one, if that's okay." The cashier says yes, and he leaves.
Is he crazy! You do not leave your baby alone on a check-out counter with a stranger (and yes, given their dialogue, I think it was safe to assume they do not have a social relationship outside of the store). GO GET A CART!

It's things like this that make the dad's on TV commercials that don't how to cook dinner, or clean the floor look like plausible human beings.