That was the precise verdict of more than one Wolves supporter on Twitter after the Championship leaders' heroic display at the home of their Premier League counterparts.
The 18-year-old left-back, who is on loan from French champions Monaco, returned to Nuno Espirito Santo's side on Tuesday as one of nine changes.
And he more than lived up to the recent hype surrounding him - Arsenal and Everton are both said to have taken a shine to him - with his beating of Walker, City's £50 million summer signing from Tottenham, a particular highlight (see below tweet).
Here's how Wolves fans reacted to Vinagre's display:
Ruben Vinagre is only 18 years old what a player he will be— ben (@BenC_29) 24 October 2017
Ruben Vinagre has been detained by Man Citeh security staff. They're attempting to remove Raheem Sterling from his back pocket #wwfc.— Southy (@__Southy) 24 October 2017
Ruben Vinagre is also an absolute baller.— jamie (@butlerwwfc) 24 October 2017
Still can’t believe Vinagre sent Kyle walker back to Tottenham ⚽️— alexjones. (@alexjjones_) 25 October 2017
Vinagre. Jeez, just who is this kid? Is he real? One bit of skill in the second half made me all moist. Get him tied up, sharply. #wwfc— Darb (@Darb1983) 24 October 2017
Ruben Vinagre sending Kyle Walker back to Tottenham. My guy— ຮς๏ŧŧ (@wwfcscott) 24 October 2017
Vinagre was impressive again. Unbelievable that he’s only 18 but dealt with Sterling, Danilo, Walker and De Bruyne at various times tonight.— HUGE (@HUGEWolf) 24 October 2017
Think there's some serious truth to the rumours of the big teams watching Vinagre. Potentially world class player on our hands. #wwfc— Jay Barnsley (@Jay_Barnsley) 24 October 2017
Heros the lot of them tonight. Bright has bags of potential, Norris a very adequate no.2 and Vinagre will be a world class player #wwfc— Curt Lycett (@CLycett) 24 October 2017
Wolves became the first team to stop City from scoring in 90 minutes since April, despite Pep Guardiola naming Sergio Aguero, Gabriel Jesus and Raheem Sterling in his starting lineup.
But the hosts proved deadly from 12 yards, scoring every single one of their penalty kicks to win the shootout 4-1, after Claudio Bravo had saved from Alfred N'Diaye and Conor Coady.