.....or,what if he suddenly forgets how to drive while he is driving home some night?
This is also a symptom of sexual abuse in children. They subconciously block out certain periods of time. Not making a joke about this btw, my wife has a masters in criminology and when I brought this up to her that is what she mentioned.He's been suffering the loss of time/memory since he was a kid. Sounds like alien abduction to me.