Let's be honest, everyone knows the rule that when someone calls shotgun you have to obey the rules.
That's like Drivers Ed 101.
Those are the rules that Zeus the husky clearly understands, so it makes sense that he didn't want to give up the front seat when his owner told him to move on out.
Zeus' owners may call him the "stubborn husky," but he just looks like a good boy who likes to play by the rules.
Therefore, he is NOT moving!