Nightmare

I had a nightmare the night before last about boys playing basketball in an industrial neighborhood. They had lowered a wrecking ball to weigh down a big white plastic garbage can on top of a building right next to where they were playing. It was meant as a marker for other kids to be able to find them. At one point they stopped playing basketball and started to play with the pulley and the wrecking ball and it came loose from the cables flying off into the residential neighborhood. I thought that's dangerous, it might hit someone. Then I heard a scream and knew someone had been hit and killed by it. All the kids ran away and I woke up horrified.