This is the moment a teenage driver crashed his car moments after he bragged about inhaling gas balloons.
Daniel Ross, 19, spent two and a half hours high on nitrous oxide - also known as laughing gas - and phoned a drug dealer for more a short while before his collision.
In horrifying dashcam footage, Ross can be heard inhaling the Class C drug as he sets off in his car.
Just five minutes later, he joins the A1 near Baldock in Hertfordshire and speeds along the road, zigzagging past other vehicles.
Ross then drifts off the road and collides with a bollard causing his car to flip on its side.
