here's my rear brake caliper story, I was on vacation at Deal's Gap on my SV650 with a group of friends, the night before, I swapped out a dirt tire for a street tire (mounted on wheels) The next day, about 90 miles from our rental house, I was not keeping up with the group, and rode right past them when they pulled unto a restaurant for lunch
One of the guys started to chase me down, after about 5 miles, I caught a glimpse in my mirror, and hit the brakes, I thought I threw the chain, it was a loud crunching noise after I came to a stop (this all happened leaned over mid corner @ 65mph±)
apparently, the night before, I fergot the cotter pin in the bolt between the trailing arm, and the caliper. when I hit the rear brake, disconnected from the trailing arm, it began to rotate with the wheel, first, it stretched the brakeline to the point it snapped, then it continued to rotate till it slammed into the swingarm, with such force, the caliper mount broke
Sending the caliper flying outward, till it hit the wheel, with enough force, to put a 6" gash in the wheel, and my buddy wanted me to plug it with chewing gum
Luckily there was one person in the group that didn't go on the ride, he was there in 2 hrs, to rescue me, got my bike back to repair shop, just as he was closing, he has it welded up, and my other wheel on, with tires swapped. The wheel was repairable, so after vacation, I had that done