Those of us with a reputation!
I occasionally made what we called contact explosives that were similar to large caps. If I recall, we would put solid iodine in a filter paper and then pour amonia in it. The wet iodine on the filter paper would be torn up into small pieces and left to dry. The next day we would litter them in the halls at school. They went off each time someone stepped on them.
Earlier I said it was amazing I was still alive. No, I never came that close to killing myself with chemicals. However, the class bullies and football players did not always like my tricks.
“...However, the class bullies and football players did not always like my tricks...”
We were nerds before there were nerds.
I put a small amount hydrochloric acid in test tube and covered the end with a balloon. I suspended it over a small beaker of iron sulfide. About an hour later, poof! Hydrogen sulfide gas stinks! It wasn’t enough to hurt anyone, but we got two days out of school! I was sweating that stunt.
Man, how I loved science lab!