The loving father found his daughter's horse stuck in muddy waters at a Gaven property, exhausted and desperately fighting for his life.
"I knew something was wrong when he didn't come up for breakfast after I called him," he said.
"I went looking for him and that's when I saw how deeply he was stuck.
"Straight away, I knew I wouldn't be able to get him out by myself so I called the firies."
The Walker family rolled up their sleeves and pitched in with rescue crews and a specialist veteranarian to save Mimojo.
Everyone - mum, dad, grandparents and daughter Brooke - slipped on gumboots to help to untangle the horse, before a winch was used to lift him to safety.
Mr Walker's daughter said she panicked after getting a call from her dad, explaining the situation.
"I felt so distressed," said Brooke Walker.
"I've already had to bury a horse because of a broken leg, so I really didn't want to go through that again.
"I raced home and it was a relief to see everyone already there helping.
"It was a great team effort and I'm so grateful for everyone's support."
Mr Walker said he had not expected Mimojo to make it out alive until he was out of the mud.
"We're not sure how long he was stuck there but his head was nearly submerged by water," he said.
"He seemed so close to giving up the fight.
"We're lucky the firies got here quickly."
Equine vet Michael Higgins said Mimojo would recover fully within the next few weeks despite several bruises and cuts.
"He's a very lucky horse."
Mimojo was scheduled to jump at the Gold Coast Show but Ms Walker said they would let him recover first.
"He's going to get a lot of extra love and care for the next few weeks," she said.
"I'll make sure he doesn't go wandering at night."
It was the second rescue on the Gold Coast in two days, after another horse was stuck in a muddy creek at Nerang on Friday.
Mr Higgins used the example to remind people to keep their horses away from steep slopes when it's dark.
"Anywhere where there's a steep slope is a risk," he said.
(Gold Coast - July 29, 2013)
