Have you ever placed a firecracker under a heap of small stones and lit it?
Many times. I'm surprised I still have all my fingers.
A toilet paper tube filled with either black powder or pyrodex makes a great firecracker! It can also raise a column of water about 20 ft up when set off in a shallow (<2ft) enclosed body of water!
KNowledge gained in a youth misspent doing crazy stunts.
Hey! hold my beer and watch this!
No but I put one in a manure pile once.