A boy racer killed a 16-year-old boy while careering at nearly 70mph in a 30 zone while waiting to do a speed awareness course. Rookie driver Adam Ali was about to do the course after being clocked speeding on a motorway and wrongly using his car horn when he killed victim Ben Burbidge, who was riding in the back of his Corsa at the time. The maniac driver had been "showing off" to three friends when he put his foot to the floor through a residential area during wet weather . Ali, then 18, lost