I also got into a lot of trouble with the chemistry teacher because I'd had this great chemistry teacher in India and I knew more chemistry than the chemistry teacher did. So I remember, on the first day of chemistry Mr Daniels, who was the terrible chemistry teacher, he was showing us that... doing experiments showing liquids can turn into solids and solids can turn into gasses and so on. And he had a white lab coat on and a little pair of round glasses. And we were standing around and he was doing these demonstrations, and we had for instance the Bunsen burner running to boil water and one of the things he did, to show that solids could turn into gasses is he put a bit of aluminium carbide into water and it started bubbling. And he said, 'So you see it's making CO2.' And I knew that that wasn't... That doesn't make CO2, that makes acetylene. That's how carbide lamps work. So he had a balloon on the top of the test tube and it was blowing up and he's explaining how this is making CO2. And I said, 'That's not CO2, that's acetylene.' Then he said, 'No, it's CO2.' I said, 'No, it's not, it's acetylene.' And I took the... I took the balloon and I stuck it over the Bunsen burner, it goes: kaboom. And what I hadn't countered for is that it burned all the rubber from the balloon and so Mr Daniels was like covered with soot from all this acetylene and rubber burning. And he takes off his... His glasses were covered with black soot. And he takes off his glasses and there's like these two little round holes where he's not covered with soot. And the whole class starts laughing. And he gave me a D in chemistry even though I knew way more chemistry than he did. I just did not get off to a very good start with him. So I was always kind of in a battle with the administration in high school.