We watched as a car in front of us hit the cement divider then got back in the lane only to suddenly veer off to the right and hit a water tanker. I pulled over to check on him and he was shaking, and losing consciousness. A Kuwaiti guy who pulled over said he was on drugs. We called the police and after 15 minutes they showed up with the ambulance coming 10 minutes later. They woke the guy up, he got out of the car and was arrested.