Many years ago a farmer acquaintance of mine, and his son, were fixing a flat on a manure spreader. Read that as, rusty, nasty, and used tire.

When the ring blew off, it basically took a part of his head from his hairline with it.

It didn't kill him, but it sure did ruin him as a strapping hard working middle aged man.

Ever since I won't even be in the same area when one of these (from 15" to semi size) is being inflated.