Dumber than a "Bag of Hammers" comes to mind.

He just bought a new boat and decided to take her for the maiden voyage. This was his first boat and he wasn't quite sure of the exact SOP (Standard Operating Procedure) for launching it off a boat access ramp, but figured it couldn't be too hard. He consulted his local boat dealer for advice, but they just said "Don't let the trailer get too deep when you are trying to launch the boat." Good advice, if he understood the actual concept of launching a boat from a trailer.

Well, he didn't know what they meant by that.

Some people should not be let out alone...