[tweetiepooh]

I didn't get into trouble but I took out the bottom of a fume cupboard during Chemistry Club. I was doing that wonderful experiment mixing aluminium dust with ground up iodine but I spent longer grinding than normal and reduced the iodine to a fairly fine powder. The mixture started producing iodine gas fairly immediately so, as normal, the mixture was taken to the fume cupboard and the teacher added the "catalyst". Normally you get spluttering and lots of purple fumes. This time it melted through the metal plate used for the reaction and smashed the protective tile at the bottom of the fume cupboard.
Happy days, not likely to be allowed that sort of thing in these days.