def start there, it's the easiest point of inspection for this kind of thing... starter takes about 20 min to pull, then you can get a view of what's going on.
The likelyhood it jumped time is low, but I would check it before running the car again, that's all. the failure on my car happened at idle also according to PO. And the fact she had the crank pulley confirms. I mean if she was at highway speed, not likely she would have found the runaway pulley by the time she stopped lol.
this is a pretty big failure, if it is the flywheel, changing the clutch isn't hard but it is a lot of work. at least on these cars the trans comes out without subframe removal. Three other trans jobs I've done all req'd subframe removal.