a know all, after a tv ad for a range of clothing.
guy loading people on to a boat
another guy comes up and comments on how many people the 'captain' is loading, to which the captain replies 'don't talk to me about boats, I know boats'
the captain steps onto the now overloaded boat and goes straight thru the deck.
person 1 'are you sure you know how to wire up that house'
person 2 'yeah it's simple, it's just some wires'
person 1 'i know boats'