A genuine one...
On the first day of secondary school, our form tutor (a chemistry teacher by trade and ex-FA Referee so stand up bloke) said "OK kids, come with me to the playing field!"

Sure enough we went to the playing field, and he brought with him a bucket of water and a large, dark brown glass box. He turned to us and said "OK guys, when I say run, run as fast as you can down the hill, but try and get a look back if you can!"

"RUN!"

...

BAAAANG!!!

Turns out in the brown box was a fecking huge lump of Sodium. Kablooey
(Brighton RAWK at the tone, the time will be:, Thu 17 Mar 2011, 11:38, 5 replies)

teachers
with explosives = top stuff.

ours taught us how to make gunpowder as "we were going to try it so may as well know how to do it properly"
( zulu eh?, Thu 17 Mar 2011, 11:40, closed)

epic win ^^
(Brighton RAWK at the tone, the time will be:, Thu 17 Mar 2011, 13:50, closed)

^^^
This.
( Trollman, Thu 17 Mar 2011, 14:21, closed)

Damnit
You stole my story. My science teacher in third form did the same thing.

He was the man.
( jakedamusss I understand, and dont care., Thu 17 Mar 2011, 23:40, closed)

I think most people at some point have had a teacher like this. I was lucky enough to have him as a form tutor as well :)
(Brighton RAWK at the tone, the time will be:, Fri 18 Mar 2011, 11:15, closed)