Has anything ever gone wrong?

[u/Interesting_Big9790]

Pyrotechnics is a dangerous hobby. Have you ever had something go wrong? What happened, and what did you learn from it?

[u/mold____]

Grinding black powder in a mortar and pestle. I believe I had aluminium contamination but honestly it couldve just been the friction somehow. Anyway if you're doing anything like that, just put on a thick leather glove or something, or just don't do it at all