I've had a few of those go. One while I was standing a few feet away from it ... but luckily I wasn't hurt. I failed to loop the steel cable correctly after installing a new door, & it shot off like a shotgun while I was on a step ladder adjusting the spring tension on the opposite side!

It bent the steel support & adjuster like a pretzel. Certainly would've broken some bones had I been on that side ...
After the first one failed shortly after moving in here, I ran safety cables through all of them. I was amazed there was no damage to the Marquis. After that one strike, I fixed all of them - and good thing too, because one failed right after my '07 Silverado made it's home there for the first time.

That would have really sucked with less than 100 miles on it ...