Many mobs not only move spastically, but they never stop moving like they're having a sugar rush either. I'd suggest they could be slowed down and given the ability to stay still for a bit.

The following mobs are affected by the non-stop movement:

• Gallimimus
• Mammoth
• Velociraptor
• Deinonychus
• Mosasaurus
• Liopleurodon
• Ichthyosaurus
• Plesiosaurus

Sarcosuchus constantly swims and turns spasmodically when in water like a hyperactive minnow.

Also the gallimimus AI could use some improvement, when it comes to a cliff it will stop too late becouse it's so fast and will fall to it's death