I don't get zombie movies. It's easy to outsmart zombies with machines. XD
It can use a car lifting clamp used in garages on the sphere from within and it can get out of any zombie pile. XD
And maybe a gear assisted spinnning blade that spins surrouding the sphere. XDDD
Point being. They are mindless zombies.
Kind of like you reckless fuckers trying to control me and frame me.
Coming up with insane excuses and making me into a sacrifice.
At least the zombies aren't consciously evil.