I was just looking through a load of old e-mail from university, and found this:
To: [the entire biology, chemistry, physics, and pharmacology departments]
Subject: The Chemistry of Fireworks
Date: Wed, 23 Feb 2000 09:07:27 +0000
I would like to apologise to all those people who attended The Chemistry of
Fireworks lecture yesterday. I take full responsibility for the
inconvenience caused, and hope things can return to normal in two weeks'
time, with [DELETED]'s lecture on forensic chemistry, which definitely
will not contain any flashes or bangs.
Once again, many apologies.
I'm still curious.