It could also be a seizure resulting form a lethal brain tumor. Remember the late Robert Novak, who had a clean driving record and inexplicably struck a pedestrian in DC. Turned out he had a seizure caused by the glioblastoma that eventually killed him. Right now Mr. Bryson might well beat the felony charge because he has a far worse problem than any felony prosecution.
seemed ok enough to walk out of the hospital and fly home the next day.