You know, it's interesting to me that during the traffic stop in Moab, GP punched BL's arm and I think she was telling him to pull over and he said she yanked on the steering wheel causing him to hit the curb. [Never a good idea to do that!] It occurs to me that perhaps he was afraid to pull over, and continued to drive, in a bit of fear-flee mode and that could have been why GP punch his arm and yanked the steering wheel - - to make him pull over. If this is what happened, it suggests to me that he might have been fleeing in a tiny way in that instance.
He did laugh with the LEOs, but not at first. At first, his demeanor was very cautious. He kept his hands in view [always a good idea], his facial expression "innocent, sincere, friendly, cooperative" all rolled together. He was acting nervous outside the van too, but eventually, I think when he realized the LEOs he was talking to was "understanding" his point of view, he started to relax and joke around with them.