Distracted or sleeping? He used turn signals so perhaps he is not sleeping. If I want a good sleep, I just get behind the wheel. I must be so careful. I have exited the motorway and taken a short refreshing nap.
"Err...you do realise thats caused by the wind?" Yeah, you can just see how windy it is by the trees and bushes swaying.. oh wait, they are stationary? Could that mean there was no wind? Muppet! :)