A similar kind of thing happened to me not long after I arrived in this country. Better half and myself were going out one evening and on the way out put a bag of garbage on the porch to put out by the roadside later on. Yes you guessed it when we came back we got out of the car and headed towards the porch, well we both noticed the bag moving at the same time and a skunk backing out of it with it's tail high in the air, I turned around to head back to the car but as I did I heard the car doors lock with the better half inside the car killing herself laughing. As luck would have it he just ambled off across the lawn and that was the last time I ever left a garbage bag out at night. I built a box the following weekend at the end of the driveway to hold them after that