My roommate would always come home and run inside to grab something, while leaving his car running in the driveway (this would happen at least once a day). One night my friend and I came home and found his car running in the drive way. So we backed it out of the driveway and parked it around the corner. When we walked back to the house we found him on the phone with the police dispatcher and as soon as he saw us he replied, "Nevermind!" and hung up the phone. He wasn't too happy with our stunt.