Two airhead carpenters are nailing new siding to a house. About half of the nails that carpenter #1 pulls out of his bag of nails are tossed over his shoulder. The others are successfully used to put up the siding. Carpenter #2 asks, "What are you doing?!?"
The first carpenter replies, "I can't use about half of these nails because they're pointed in the wrong direction!"
The second carpenter tells him, "Don't be stupid. Those are for the other side of the house!"
