A woman who fell out of a moving campervan on the Waikato Expressway was trying to shut a door.
Waikato police Senior Sergeant Rupert Friend said a couple were travelling south on State Highway 1 in their campervan when the woman went to shut a door that wouldn't close properly.
"A female passenger in a caravan has tried to fix a door that wasn't quite closed properly and has ended up being injured as a result of those activities."
The woman, who suffered a large amount of grazings and cuts, slipped out of the vehicle and was currently in Waikato Hospital's intensive care unit, however she was "not too bad all things considered".
The 59-year-old's husband was driving at the time. He was understandably upset, he said.
The couple were New Zealanders travelling home "further down the line", he said, unsure where.
Friend reminded motorists to pull over before attempting to check on any noises that may have come from their vehicle.
"I think the biggest thing is if you think there's anything wrong with your vehicle make sure you stop at the location before having a look at it or attempting to fix it."
The serious crash unit attended the scene but he didn't believe there was anything wrong with the vehicle.
Swerving skid marks were all that was left at the scene, at the exit to the Avantidrome, after the campervan was taken away.