Shytorque - thanks crying with laughter.
Off topic but when I was a lad my older (smart ass) brother was in the shed (which was also contained the outside WC) mucking around with his chemistry set when there was an almighty explosion. He emerged hair all over the place, covered in dust & somewhat dazed - mother who was sat on the said WC emerged a few seconds later obviously very deaf, vowing to kill him - he had "invented", bottled & (briefly) set fire to a quantity of hydrogen!
