A friend of mine owns a body shop and also races an asphalt late model. In the off season the race car sits in the back corner of the shop with a cover over it. Being a body shop, inevitably he's got critters, so he got a dog to rid the shop of the little varments. Well the dog is so friendly he probably sleeps with mice at night. Long story short, First time out with the race car the next season the car seemed to be lacking power, 'til the second lap, when heading down the back stretch at full throttle, out of the tail shoots a ball of flame, followed by a trail of dog food. Turns out the critters where camping out in the muffler of the car all winter and stockpiling a food supply. That muffler was full of dog food. Got a pretty good chuckle through pits that day.