Watching snowmen melt away.
Seeing the water wash some kids sandcastle away.
Roadkill.
Refusing to give the neighbours kid his football back when it lands in my garden.
Revving your engine as old ladies slowly cross the road.
Sitting on the disabled seats on a bus and pretending you can't see the pregnant woman who needs a seat.
Ok, those things make me mad, but you know somewhere out there, someone gets happy over this.