Seems like a new driver in a car he/she can't handle. Stopped late at a roundabout, stalled, weaving left and right down a straight. Get a car you can handle mate!
This driver was in the wrong lane and so instead of carrying on and getting back to the correct route safely they decided they were allowed to dangerously cross the solid chevrons.
He wet himself every night until he was 17. Went to school in nappies. Now he's a psycho behind the wheel.