I shouldn't really admit to to this but . . .
Picture the scene - nice shiny 1985 Merc 500SL sitting in the garage with the new electric roller garage door open. Muggins decides to set about putting the rest of his Bilstein B12 front suspension into his beloved E36 328.
The trolley jack won't go under the car so I have a couple of pieces of door offcuts to roll the car onto to give clearance. They are quite short so it's easy to over shoot. I find it helps to left foot brake to stop in time (you can see where this is going).
First attempt - too timid (the door are 2" thick with a bit of an angle cut on them).
Second attempt - bit more throttle & we're up & on the platforms. Left foot brake, & that's when it all went tits up.
My trainers have quite a welt on them & as my left foot came down it caught my right foot (still on the throttle). Car lurches forward a bit - slight panic so stomp harder on the brake which pushes my right foot down harder on the throttle. 328 hits the 2 wheely bins between it & the SL. Extreme panic mode initiated. Braking harder now but the 328 won't stop. It's like a pitbull after a labrador. I watch in slo-mo as the SL's grille crumples followed by the alloy bonnet.

£1500 damage to the 328 (I thought it might be written off). Fortunately it was all pretty superficial. The SL fared worse-

That grill is £300 + £150 for the MB star.

New headlight £800 - luckily I had a spare lens.

The killer - kinked alloy bonnet (they're supposed to do that in a crash) - £2500. Throw in another £100 or so for the heat insulation pad.
All told £4000 for the Merc. Fortunately I'm an 'mature' driver so the ncb loss hasn't hit me too hard. My only crash in 39 years (there was another but I was the victim there).
The insurance assesor said he goes to 2 or 3 runaway autos a week! His last one was a 4x4 that went through a closed garage door & pushed the car inside out through the back wall!!!
Laugh if you want but it could be your turn next!