My dog started walking sideways and rolling his eyes in his head... What do u think might of happened to him?

Moved your post to dogs, you posted in forum help where you ask for help with the forum

I can only guess, but I suggest getting your dog to a vet soon, this doesn't sound good.

If you haven't taken your dog to the vet yet I would do it immediately. Vet offices always have emergencies forwarded to them by the answering service when they are closed. It sounds to me like there is something wrong with his nervous system, could be damage to the brain or spinal cord. It could be from a physical injury or an undetected illness. Either way, your dog needs medical attention immediately. I'll keep you and your dog in my thoughts. Please keep us posted.