"When he was first admitted to hospital he said, 'At least I'm not dead'. But now he's realising the gravity of the situation on his life from now on."
Mr Keys' siblings Ian, Charlie and Fiona had all been busy visiting their brother in Middlemore Hospital, the family friend said. "When this sort of traumatic accident happens, it drops into your life like a bombshell and the implications go far and wide.
"But they're bearing up. They're a supportive family of each other.
"Ian said as a family their lives would never be the same."
Hauraki District Council chief executive Langley Cavers revealed there had been several previous incidents of ground slumps over the years in Morgan Park. "I think there has been a series of holes. They've all been within about a 100-metre radius of that area - every two or three years one will pop its head up."
Nobody had been injured in previous incidents, he said.
*You can help donate to David Keys at his Givealittle page here.