Some dramatic testimony this morning at the trial of a logging truck driver charged with the deaths of two people after a tragic 2004 accident on the upper levels highway.A witness says he was driving about 200-metres behind a pair of speeding logging trucks when one of them lost its load on a sharp curve, sending 19 huge logs into oncoming traffic.

The witness says he was travelling at the same speed as the trucks - about 90 km/h in an 80-zone.

He recalls hearing a crash and seeing smoke.

He then tried to help an injured, trapped woman by smashing in her window and turning off her car.

The truck driver, Perry Pelletier, has pleaded not guilty to two charges of dangerous driving causing death.