I probably shouldn't over-describe some of my images since it gives away whatever meagre "magic" they may possess. But since this one turned out EXACTLY how I planned, and since it's only the second "successful" (well, in my view anyway) candid I've done (OK, maybe third), I can't help myself.
As I was having breakfast in the Canberra Centre food court, I saw this gentleman trying to catch up on some shut-eye in a way that suggested "Oh, my achin' neck..." On the monitor in the background a series of advertisements kept repeating, including one for a pain relief capsule. So it was just a question of waiting... and waiting... and... bingo!
And with that, I finally figured out what nefarious uses live view on the 40D can be put to. 8^>
("Who, me? I'm just sitting here reading my paper and having my breakfast. My camera's just sitting over there minding its own business with its remote control cable just sitting under my hand...")
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Edit, August 2023: These days of course it would all be done through a remote control app on my mobile phone...