TRY THIS AT YOUR OWN RISK!!!
I shall not be held responible for loss of property, limbs or life (etc. etc) for any one trying this stunt. The following is rather destructive. You have been warned.
I did a few floppy drive bombs. I did not do this to any of the teachers, but I did do this to a few of the people that were bullying me.
1. Take 1 floppy disk, 1x Box of matches
2. Scrape the tips for the match sticks. You will need to do this to about 10 match stick head.
3. Grind the match stick heads up into fine dust.
4. Open up the floppy and apply this match dust accross the disk.
5. Get a disk label and put some thing important one like "IMPORTANT FILES" or some thing like that.
6. Smuggle disk with the rest of the normal floppy disk.
What will happen is that as soon as the disk get used, it will start a fire and melt the disk inside the floppy drive.