A little bit on an IFIOTW post, but you'll all love this:

http://www.youtube.com/watch?v=HUVNf-y349E&feature=related

Somehow I doubt he tought his cunning plan all the way through :p
This thread is now about funny mishaps or other events in and around classrooms.

OxyAcetylene for the win!

http://youtube.com/watch?v=QepsBsSl6eI
I think his shirt was the problem.

high explosives 5 feet away from you

of all people you think they would have safety glasses

He must have tried it with just acetylene (or a non-optimal mix) and thought it was going to be the same! That's precisely why I own one of these:

http://www.fixandweld.com/images/SSP11.jpg

http://youtube.com/watch?v=QepsBsSl6eI
I think his shirt was the problem.

Obviously.

I love how he's just chillin with the desk on fire.

Lol @ overpressure.