1. Some moron pulled out in front of you on the road.
2. Someone did something extraordinarily stupid.
3. Something broke.
4. A piece is missing from whatever you are trying to assemble.
5. Someone ran into the sliding glass door again.
6. Someone left Legos on the floor.
7. The dog crapped in the house.
8. Your parents caught you sneaking back in at four in the morning.
Jack: "That makes time number three this week, dumbass."