The Athletic players nerves held, winning the shootout 4-3.
"I didn't pack enough chewing gum and I didn't have any nails left," King said.
A number of locals were upset with the Burney goal, but King said it's not like wearing a referee outfit would have changed the call, as that father and son combination had been in charge for three quarters of the match.
"You can't accept 90 per cent of their decisions, and not the last one."
As well as Burney getting a double, the other Athletic goals came from Jake Simcox and Peter Czerwonka, with Athletic up 2-0 after 15 minutes.
"We were really positive, I think maybe the fact we were in an uncommon position, for this season, we got speed wobbles," said King.
"Cup football is always different, you play like there is no next week.
"I don't think we won the game – we escaped."
The GJ Gardener Wanganui Athletic Reserves experienced similar euphoria in their cup fixture with the Hokowhitu Reserves, winning 5-4 after extra time.