A Nedlands GP has been accused of being distracted by her phone when she crashed into a Coles delivery driver and his truck, causing him to have a leg amputated.
Christine Marie Caffrey denies a charge of dangerous driving causing grievous bodily harm to Matthew Chapman on Vincent Street last August.
Mr Chapman was was standing behind the truck preparing a delivery when he was struck by Dr Caffrey's Subaru, causing severe injuries to both his legs.
Prosecutor Judith Fordham said the allegation was that Dr Caffrey was on the phone either at the time or just before the collision.
The large white truck was parked on the side of Vincent Street, with an indicator flashing and should have been clearly visible to any driver paying proper attention, Ms Fordham said.
Giving evidence, Mr Chapman described the "unbearable pain" after the impact.
But he was still able to talk to Dr Caffrey, who immediately claimed she had not seen him.
An eye witness also described how the GP had administered first aid to Mr Chapman after hitting him with her car.
The trial continues.