who had the worst shock?
I say the cow.
After all firstly it has the shock of falling. then, while it's falling it thinks to itself "i'm gonna hit that concrete quite soon" and prepares for that. the next thing it knows it's hitting a minivan, which has to be a shock, not only because it's a minivan instead of a road, but because it's sooner than expected anyway. After that it's thinking "owch, that ****ing hurt... i hope they'll fix my legs and ribs up nicely when i get to hospital. I could use some morphine, too." Then a bullet goes through it's brain. Another shock.
If it was any other species than a cow i'd feel sorry for it.