One of my cousins was a victim of a stag night prank that almost had him missing his wedding day. His mates had hired a coach to do a pub crawl that covered a large part of rural Yorkshire. At the furthest point form home, in the middle of nowhere, they stopped the coach, stripped him down to skin, and produced a welding set from the coach's luggage area. they then welded a ball and chain to his ankle (there were a few skilled metalworkers amounts his so-called friends*) and left him on an unlit country lane.
At some point close to dawn, a police patrol luckily picked him up. They provided him with clothes and a lift home, but didn't remove the ball and chain. Not sure how he managed that, but maybe one of his mates had sobered up enough by then to help.
The moral of the story? Never have a stag night on the eve of your wedding. He was not on great form, weaving a little as he stood at the altar.
*One of whom was his identical twin brother...