It seems Bryson is epileptic, or at least had a seizure of some sort.
There are various forms of epilepsy Hawkeye. Jerking seizures are the stereotypical form because they are the most obvious, but far more common are what are called absence seizures in which a part of the brain stops functioning for a while, but the rest continues to function normally. My sister suffers from epilepsy and while her medications have it under control now, when she had an absence seizure, she'd look around, somewhat glassy-eyed and tend to keep doing whatever she had been doing before the seizure began, but poorly as if she were drunk. Sometimes she can even respond during those seizures, but usually they are too intense for that.
So from personal experience I can attest that it is quite possible for Bryson to have had a mild absence seizure that would have led to the first accident and then while it was still going on have gotten out of the car, get back in and then drive away to get into the second.
