Re: ah, schoolday 'pranks'
Not to mention:
- Sugar and weedkiller, but not in small tins. The class pyromaniac favoured lengths of bicycle frame with the ends beaten over.
- Potassium permanganate and glycerine, inside an empty desk. Began to burn about halfway through the lesson.
- Acetylene from calcium carbide dropped into a bottomless oil can standing in water, then ignited through the hole in the top. Amazingly, in the 1960s bike shops still stocked calcium carbide for people to use in cycle lamps.
- Iodine and ammonia. Anywhere.
It sounds like Bash Street, but this was a grammar school in what was, according to New Society, the most middle-class town in Britain.