Free: Contests & Raffles.
I've seen both, depends on the size of the herd and how spooked they are. If the herd is big and they are spooked hard, it's going to get crashed one way or another. I don't remember seeing the lead animal ever plow through without jumping though.
It has been my experience that elk will go where they want to go regardless of a fence or not. I have seen them blow through barbed wire like it wasn't there, Seen them burrow into the nastiest thorny patches no man would venture into and seen them in my moms front yard jumping the fence to get into her apples.
My mom is the same way with wildlife in her yard. Plenty of whitetails and red foxes to be had. She'll allow nothing of the sort.