it stopped just before the end with the added retardation of collapsed gear.
Could somebody put me right if I'm wrong, but all my physics training says that one collapsed main gear is a LOSS of retarding force. Additionally it's only on one side of the plane. How many tonnes hit the ground at what, 200 knots? And then the pilot brought it all to a stop in a straight line on the runway using only the braking force of the other main and the nosewheel.
If it had been sliding on its belly, it would have ended up in the arresting gear at the end of the runway. Probably with leaking fuel ignited by sparks! And if it had gone off the runway, it could have flipped and broken up.