I've seen the chap in the first article linked, he's an alcoholic transient with obvious mental health issues. Very sad indeed.This also happened in Aberdeen
earlier this year, my friend snapped a photo and put it on Facebook -
Nobody was seriously hurt, no idea how it happened.
Sadly no photographic evidence but I witnessed something similar back when I was a student, here (at the far end by the car park):
There was no barrier there when I was there, it had been raining and presumably the bloke who reversed into the moat (after picking his daughter up, she was very embarrassed by the whole thing) thought it was a puddle. Took quite some effort and head scratching to get the car out, they dragged it out in the end, the scraping didn't sound healthy, may have been worse than the water damage.