He gave a breath-alcohol level of 600mcg and told officers he had downed "three or four Cody's" and was picking up a friend.
Duffy appeared in court on the charge eight days later and within hours of getting bail, he was back on the road.
Driving the same Nissan, the defendant backed into a stationary vehicle in Cole St.
A witness reported him "stumble" from his car and on to the grass verge and when police arrived, Duffy was hardly the picture of sobriety.
Officers approached him while at the scene and saw him drinking a bottle of beer.
Duffy was forthright with his explanation, if frank.
"I'm f...ed. I was driving," he said.
His breath-alcohol level of 1045mcg was "extraordinarily high", said Judge Peter Rollo.
The legal limit is 250mcg.
The final episode took place on August 12 when Duffy lost control on a bend in Quarry Rd.
He slammed into a parked car but continued his ill-fated journey, hitting another unoccupied vehicle further down the same street.
With a shredded tyre, smoke spewing from the engine and a smashed windscreen Duffy drove on.
But a concerned member of public followed the wreck as he headed towards town.
Police caught up with the defendant in Sidey St and he was taken to the station where he provided a blood sample.
This time he was more than three times over the limit.
Judge Rollo described it as: "a picture of dangerous driving with real risk, not only to you and parked cars but others in the vicinity of the road."
Daysh said her client accepted he was an alcoholic.
"When he's under any stress he resorts to drinking, and drinking to excess," she said.
Duffy had responded in a similar way when he found out he was to be a father but since the child's birth, Daysh said, he had taken to parenthood.
"Your son will expect you to provide the best example a father could provide, don't disappoint him," said the judge.
Duffy was sentenced to five months' community detention, 12 months' supervision, 150 hours' community work and $500 reparation.
Judge Rollo disqualified him from driving indefinitely and ordered him not to own a vehicle for a year.