The photos verify my post above. The sheared bolts are probably a result of them being loose and as you were driving and using your brakes the backer plate with the caliper attached attempted to rotate with the disc until eventually all those bolts sheared allowing the caliper to whiz around and rip off the brake line and whack the shock a couple of times as well as bend itself in the process and ultimately digging into the rim.
All-in-all, you got off lucky!
You may want to check the tire for a "flat spot" or two. I'd be suprprised if the wheel didn't actually come to a full stop at least once while all of this was happening and if so that flat spot on the tread surface will be impossible to balance out and induce awful vibrations inside your coach!
The bottom spring clampng plate/shock mount also took a couple of hits from that caliper and surprisingly it remained relatively intact except for a bend visible in last pic. If this happened at speed, the kinetic energy of that whirring caliper must have been tremendous!
