When I was a kid, we were at my cousin's house. He and I were lighting sparkles on a roof next to his house. Well some unlit sparkles got dumped down a PVC drain pipe, which wasn't bad until a lit one followed. Set the drainpipe on fire. Black billowing smoke led to the fire department showing up. They cut a four foot section of the pipe off near the bottom and all was over except for the beatings. My cousin ratted on me when he was the one that dropped down the lit sparkle.