I have a stiletto that has given me several hard openings, one of wich popped my left hip out of socket, and on another occasion completely blew out the bottom skin on on of the cells. I recently had it relined but haven't been able to jump it yet to determine if that fixed the problem.
I also have a friend in Colorado that broke his neck from a hard opening caused by linedump. His packer made the first 2 stows and S folded the rest of the lines.