He suffered a cracked vertebra and shoulder blade, a dislocated rib and a large cut down his backside.
Lajunen is still in Waikato Hospital, having sat up for the first time on Friday. She has damage to five vertebrae and was bruised - "the blackest colour you could imagine" - down one side of her body.
"Drivers need to learn empathy, because it's always us that's going to get hurt. In Denmark, if you hit a cyclist and you're in the wrong, you go to jail. I'd like to see that happen here."
Joyce said the top-of-the-line helmets he and Lajunen were wearing were the difference between life and death.
"I remember lying on my back and trying to sit up, but I couldn't. Sirpa was screaming 'My back, my back'. I turned and looked at her and she was lying about 3m away, with the wheel around her head like a halo ... I was hyper-ventilating, going into shock. "
Police have charged a 17-year-old man on two counts of careless driving causing injury and a 51-year-old man with counselling another driver to drive while their licence was revoked.