First drive after brake upgrade, then - BANG!

I have had several adjuster strip year ago before I started to
jack weight off the car before adjusting ride height!
That is my best hunch.
I had a 63 Sport Fury on my chest trapped like a mouse in a trap for
a couple hours be friend found me (no cell phones in the 60's).
I’ve had that happen too. Luckily I was under an alignment rack.