My aunt was home alone when something crashed into her front door. It scared her so she called the police who came, found nothing and left. The crash happened again an hour or so later - same routine with the police.
The third time, she was pretty freaked out and called her neighbor across the street. Turns out that the neighbors son was having a party and the kids were having fun 'door crashing' - a variation of ring the doorbell and run away.
I guess the kids were forced by their mom to visit and apologize that night. They put two and two together when my aunt answered the door with a shotgun. Had one of them actually broken down the door, they would have been perforated, so to speak.