[kwhitefoot]

Even further back, as third formers in 1968 or 1969 there were no computers in schools but we were keen chemists and discovered ammonium iodide.

As we were the best students we had access to the chemistry lab store room, so we made a big batch and painted it everywhere (under chairs, blackboards, waiting areas outside classrooms, etc.). It was hilarious. Again all we got was a stern talking to and a mop and bucket, and told to clean it up.

I suppose that today anything to do with explosives would be taken too seriously to be fun.