Wow.. The Great Escape! When you explained the problem, I started wondering if
you had a hydraulic floor jack in there with you.. I have two in my garage..
I also have a side entry door..
My OHD installer didn't include safety cables. (Prevents flying springs).
I didn't even know such a thing existed. After the Bang! I learned.
Yeah, seeing large the dent that a broken flying spring made in a 2x4, I added the cables..
I highly recommend them.. Odd, it's been over a dozen years and no more broken springs.?.