"They were only going about 50km/h because of the state of the roads," Ms Gamec said.
"All of sudden they couldn't see the road. Harvey was driving and as he put the brakes on there was a huge crashing sound.
He reversed the vehicle and then the cliff came down in front of them.
"Afterwards they got out, put their gumboots on and surveyed the situation.
"The vehicle wasn't driveable, it was only four months old - practically new."
The slip on Mangatipona Rd was about 400 metres from Harvey and Hazel's property in Orchard Rd.
"They were nearly home," she said.
Having a look round the other side of the slip, they found two young women in a car who were trying to get to Ohaumoko Rd.
"They and Harvey and Bryce drove back to our house by about 9.30pm.
"Harvey and Bruce got another car and drove around via Turakina Valley Rd to get the damaged vehicle."
The police were called, and they were at the slip with a roading contractor by the time the duo arrived back.
Hazel said when they checked the slip again on Friday morning, twice as much had come down overnight.
The section of road where the young womens' car had been was completely covered.
While the possible outcome was frightening, slips have become a way of life in the district, she said.
"It's slipville, mudville up here.
"Another road, another slip, another pain in the butt.
"Out here before you go anywhere these days you have to work out how to get from A to B."
On Friday, Senior Sergeant Andrew McDonald said: "If the people in the car had been five seconds ahead of where they were ... it's very fortunate that we're not looking at something a little more tragic."
The slip has been cleared.
