The mind-over-matter car stuff suddenly wasn't the only poser for Henderson in the wake of the race, which brought back memories of the last home-track winners of the race, which had total stakes of $250,000 but was, in 2007 and 2008, the richest in the country with stakes almost 10-times greater at $2 million.
Standing with wife Mary, who said the influence of her "Scottish" heritage had something to do with the win, Henderson said he might have to rethink the pre-race plans to head to Riccarton and the $75,000 Metropolitan Handicap on November 11, over a distance of 2500 metres, at which Wait a Sec won at Hastings in April, and the $250,000 New Zealand Cup over 3200 metres.
"He's been in great form for a long time," said co-trainer Grant Cullen.
"Things could change," said Henderson, though it was, of course, too late to think of a crack at next Saturday's $3.4 million WS Cox Plate, for which the Hastings Classic was once set as a lead-up event over the mutual distance of 2040 metres.
Not that he would have thought about entering such exalted class on the other side of the Tasman, where he has never raced a horse. A year ago he and trainers Grant Cullen and Guy Lawry weren't even dreaming of winning a Group 1 race.
The race had been on the radar only since nominations in August, said Cullen, who credited Lowry with most of the work getting Wait A Sec's attitude right working on the farm south of Hastings.
Asked if a year ago Wait A Sec might have been set for such a race, Cullen replied: "To be honest - No."
"He's just a very happy horse, and he's very fit," he said.
Henderson said son Paul was unable to get home from Perth. "But if we knew this was going to happen we would have made sure he was here."
By Postponed out of Grosvenor mare Security, Wait A Sec had raced well back before Parkes drove through a gap 150 metres from the post to take a rail-hugging lead, holding out fast-finishing four-year-old Gingernuts - the "absolute standout" in the birdcage beforehand, according to race commentators.
Endean Rose was half-a-length away, third, paying $14.10 for a place, a neck ahead of rank-outsider St Emilion, which led down the back and into the final turn.
Wait A Sec's win capped a great day for the Hawke's Bay stables, with Cullen and Lowry taking the opening race with four-year-old gelding Londaro, and John Bary two races, including the $70,000 Group 3 Red Badge Spring Sprint with five-year-old mare Miss Wilson.
The last Hawke's Bay winner was trainer Bary's Jimmy Choux in 2011, and the next-most-recent Moss Downs in 1997, trained by Chris McNab.