At Waitati, reaching speeds of 120kmh, police deployed road spikes in a bid to end the dangerous pursuit.
Smyth took desperate measures to avoid having his tyres punctured, clipping a truck and nearly hitting a road worker.
It was a week before Smyth was found by police hiding in the back of a friend's car. He was asked why he did not stop.
"He said he had made changes in his life and that in Auckland they used to love doing this — chases and stuff in stolen cars," a police summary said.
"He said he had stayed clear of that, but the car was his life and the first thing he had basically legally owned. He said for 15 minutes he stepped back into old behaviours."
Laws said Smyth had an "unusually high level of affection for his motor vehicle".
On the day of the incident, the defendant had attended a therapeutic session, something that had been helping his rehabilitation, Judge Michael Turner said.
"Emotions were running high," he said.
Given Smyth's progress on parole, the judge imposed a sentence of eight months' imprisonment but made it concurrent with the sentence he was currently serving for two aggravated robberies he committed nearly a decade ago.
"I'm satisfied this offending might benevolently be viewed as an aberration," he said.