Remember kids, smoking's bad for you
A friend's grandad (or great-grandad - some branch on the family tree, anyroad) worked on road repairs for the council. To be precise, he drove the steamroller. Once the boiler was lit and the steam was up to pressure, he'd release the nurdler valve and trundle out of the depot gates to wherever he was needed. There was a cornershop on the road from the depot. Our man's daily routine was to put a bit of left-hand-lock on the steering and step nimbly off the footplate, in through the side door of the shop, slap down his one-and-six for the box of matches and twenty Woodbine that would be ready waiting on the counter, pick them up, and walk smartly out of the other door and swing up back on to the steamroller as it came round the corner and, with as much elan as you can muster on a slow-moving steam-powered piece of heavy plant, away.

Except one day he missed his footing and fell flat on his face. Literally: the back wheel went over him. The steam roller carried on turning and demolished the cornershop.
(Mr Apollo Follow me!, Tue 26 Jan 2010, 2:04, 4 replies)

Ouch!
Not slapstick, but when I was a wee Kipper, I did a milkround.
We were in a diesel float, where the handbrake was a lever sticking out the steering column.
The milkman would pull the lever on, jump out and the float would stop just in front of him, where he could then take a bottle or two from the crates.
One Saturday we were mid-round when I saw a partly demolished wall in someone's front garden. When I pointed it out, he beamed and said "I did that yesterday".
Apparently his hand slipped on the brake and the float just sailed past him as he stood there.
Apparently he just reversed it off their front garden and drove off...
(Kliper Filllets Getting noticed by twats on the internet since, Tue 26 Jan 2010, 9:27, closed)

Demolishing walls, eh?
that reminds me
(Mr Apollo Follow me!, Wed 27 Jan 2010, 20:31, closed)

Didn't win the Darwin then...
Apologies, but for some reason I doubt this happened.
(Me, I'm not... in any way intoxicated, Tue 26 Jan 2010, 18:04, closed)

What? you don't take FOAF as an authoritative source?
Or is it the reference to the nurdler valve? Not being the late Fred Dibnah, I may have some of the technical terms slightly wrong...

To slightly misquote Pope Benedict on Passion of the Christ: It is as it was. Told to me, that is. (But, yes, you may prefer not to stake your reputation as a historian on it.)
(Mr Apollo Follow me!, Tue 26 Jan 2010, 19:00, closed)