In reply to:
Teachers!
I'll never forget the time my GCSE Chemistry teacher told me about time he nearly got fired on his first day. Apparently he was cleaning out a store cupboard with a colleague and came across a very old jar containing the biggest lump of sodium (i think it was sodium). Anyway, the other guy bet that it was so old it wouldn't be particularly reactive, so he filled an old wastepaper bin full of water, took it outside, dropped the sodium in and ran like hell. Anyway, about thirty seconds passed and nothing had happened, so he was walking back to the lab and was about to get his wallet out when he heard the most almighty bang. He turned round to see the bin had exploded, pinning a 1st year PE group against the wall with the force of the blast. Needless to say, he was one of my favourite teachers!

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He also came in very usefull when I was in the sixth form and had discovered home brewing. It turns out he has a post-graduate degree in Brewing. Cool eh?