The house being moved today was firmly fixed to the trailer's steel beams.
Veteran house mover Dave Coley said despite the angle it was sometimes necessary to put loads on big leans.
"I understand what people are thinking, that it looks pretty scary, but this is what happens. Sometimes there's a car or a bridge in the way and we need to get over it."
This was largely done out of the public gaze as most house haulage happened at night.
While the occasional load slipped off it was not very common, he said.
The photo, posted to a Masterton community Facebook page, fooled many who feared the worst.
"Puts new meaning to fallen off the back of a truck," wrote Jodie Kochman.
"Buggar!!! (sic)" posted Wendy Ayling.