Black Snakes

Black snakes are a type of outdoor firework. In the episode "Summer Sucks", all fireworks were banned in Colorado, except for black snakes. No one in the town of South Park was interested or excited by black snakes, but the town Mayor wanted to have a big, exciting 4th of July fireworks show. She and her team managed to create "the world's largest black snake". It was significantly more dangerous than any of the other fireworks, but because it was still technically a snake; it was legal.