Olympia supporters have a lovely habit of sounding an air raid siren when their team scores but it was Riverside coach Alex Gaetani who was picking battles after his side's 3-1 loss.
"The game was decided between two penalties," he said after pivotal calls at either end with the visitors leading 2-1.
"Ours was a clear penalty. I've since seen it on video. The second one was very soft. There's contact, he's gone down ... 50-50. If that's a penalty so was ours.
"It's not good enough to have those decisions at this level. The decisions tend to go big teams' way and it's ruined the result for us."
The contentious decisions came at either end of the second half. With Olympic chasing their second equaliser of the game, wing-back Jasper King seized possession in the opposition penalty area only to be bundled over by keeper Darby Randall as he attempted to shield the ball.
The referee ruled in favour of the defence but was more offensively-minded in the closing minutes when Lucas Hill and Will Humphrey clashed - consulting with his assistant before awarding a penalty which Jake Vandermay smashed home.
The calls did indeed determine the outcome of a contest which had seen plenty of action and another exceptional display from Olympic keeper Jarrod Hill.
With captain Taylor Neilson a late withdrawal, young debutant Max Reissig was handed his defensive midfield role and Hill his armband.
Building on the ever-increasing strength of back three Humphrey, Tom Prince and Aaron Kidmas, Riverside continue to grow in confidence and the day could have turned out very differently had Nil Sanz's 11th-minute shot bounced in off the post instead of across goal and out.
Instead, Hill gave Olympia a flattering lead on the half hour and after Aaron Campbell and Fletcher Fulton had gone close, Prince headed Olympic level from a Campbell corner.
A rare mistake by Kidmas allowed Olympia back in front, Austin Yost taking full advantage with a finish as crisp and tasty as the Windsor Park nachos.
Even after Vandermay's spot-kick appeared to have decided the contest, Olympic could have salvaged some pride but Campbell, sub Macka Hancox and a roaming Prince were all thwarted by Randall.
The third-versus-first clash at Darcy Street went to form with leaders Devonport beating South Hobart 4-1.
Joel Stone's free-kick expertise gave Strikers the lead on 12 minutes and led to Connor Parke adding a second on the half hour.
Eddie Bidwell claimed a counter-attacking third a couple of minutes later and the brilliance of keeper Nathan Pitchford ensured the visitors a comfortable half-time lead.
Bidwell bagged a fourth as Pitchford continued to thwart South before Andy Brennan and Nick Morton combined for the home side's consolation goal.
Second-placed Glenorchy Knights completed a day of away victories with a 3-0 win at Clarence Zebras.
A goal in each half from Alex Walter and a 20th-minute strike from Oscar Thomas did the damage at Wentworth Park.