Kangaroos coach Glenn Dumbrell was lost for words after his team shocked Gundagai at Equex Centre.
The Wagga side had only won three games, including two against winless Cootamundra, leading into the clash against the ladder leaders but out enthused the premiers on Saturday.
A big second half backed up a strong start for the Wagga side to claim a 43-20 victory and keep their finals hopes alive.
Dumbrell was thrilled with the effort his side put in.
"I knew we were building, and have just been on the cusp of winning each time, so it's a good feeling to put a good score on," Dumbrell said.
"Especially against a very, very good team."
Kangaroos jumped out to a 12-0 after 10 minutes with early efforts from Dumbrell and Saul Houma.
They had a great chance to go further ahead when Trae O'Neill landed a 40-20 but after an errant pass from Warren Lloyd was compunded by a penalty Gundagai were quick to hit back through Mathew Lyons.
However Lloyd atoned when he crossed out wide midway through the first half before Houma crashed over for his second with six minutes left in the half.
Gundagai responded after a penalty and Noa Fotu's try closed the gap to 22-10 at half-time before the Tigers got within six points when James Luff scored to start the second half.
Again it was off a 'Roos penalty with Lloyd punished for a late tackle on kicker Blake Dunn.
It was likely to be a 12-point swing as speedster James Morgan had collected the kick and was in plenty of space before play was halted.
However Kangaroos didn't let it stop them and after a 40-20 from Zac Graham, Houma crashed over for his third to make it 28-16.
The 'Roos then defended two sets on their line to frustrate the Tigers.
Dumbrell thought they were big moments in the game.
"The guys defended well and it was just an effort thing," he said.
"The guys really responded, hats off to them as they are all very young and they didn't back down."
Off the back of their defensive effort, Fetongi Tuinauvai broke through the line before putting Timoci Vatubuli over with 26 minutes to go and Kangaroos out to a 34-16 lead.
Vatubuli went over for his second with 17 to play after a nice short side play from Dumbrell.
Lyons hit back with an 80-metre effort minutes later but an Eddie Jackson intercept try and a field goal from Graham sealed a massive win for Kangaroos.
Dumbrell is looking to back up the performance in their big clash against Brothers on Saturday while Gundagai will be hoping a hand complaint to Lyons isn't too serious.