Personally I thought it was precisely on topic, except that nobody actually
quoted a Porsche retail price.

OK, since its embarrassing story time, I once managed to back a ford
transit into a "cab-less" HGV Chassis (perforating the old "lift up"
door)

I`ve also managed to back into a 3 foot (possibly even 4 foot) wide
column holding the roof up at a local fast-fit tyre place. Yes, it was
quite visible at the time, and the only thing I have in mitigation is it
was painted white, the same as all the walls :-}

To rub salt into the wound, not only had I reversed quite quickly
<CLANG> once I made sure I was clear of one of their ramps, but I was
only there to get a tyre changed that had been pulled on the MOT 20
minutes before, and was heading back to the garage to sort the cert.
out. I parked on an angle to obscure the damage as they checked / signed
it off :-}