Back in high school, everyday 6 buses lined up single file on the street along side the school, an hour or so before school let out. Due to the Texas heat, the drivers never waited in the buses, they always got out and sat in an office inside the school to enjoy the cool AC. So, the buses stayed unoccupied for a short time. Someone noticed that Coke cans were exactly the same diameter as the exhaust pipe. Larry decided to jam a can up the tail pipe of the third bus. Then another, and another. The fourth and fifth cans also went in, but had to be pounded in. A sixth can would not go in at all.
We sat in the parking lot directly across the street, watching. Bus 1 and 2 loaded up and pulled away. Bus three loaded up, then cranked up, sounding different. The driver put it in gear, and attempted to pull away. The bus groaned with a muffled roar, and barely moved. You could see the perplexed, confounded expression on the drivers face. He gritted his teeth and floored the bus. The engine screamed. It struggled badly, then BAM!!! Five Coke cans shot out of the exhaust like a rocket. They blasted into the front of bus #4. We sat in our cars laughing hysterically. Oh the good ole days...