Aguero and his teammates were celebrating Raheem Sterling's 97th-minute victor in the 2-1 victory at the Vitality Stadium.
There's a reason why Manchester City have been the bookies' favorite to win the Premier League since the end of last season- the funds to build a team that's deep and stacked with talent. I don't understand. Maybe someone can call me and explain to me why. In their season-opener, they beat a stubborn Brighton side 2-0, but never clicked into gear in attack.
And after City grabbed the victor amid a frenetic finale, Kompany told Sky Sports: "It is absolute madness".
For 20 minutes he must've felt justified in his mood; City a goal down from Charlie Daniels's outrageous drive and without a single shot on target.
What did you think of the game? We just couldn't hang on.
At left-back, Benjamin Mendy also made an assured full debut, stretching the Cherries with his rampaging runs and producing more crosses on his own before half-time than the entire Bournemouth team managed all day.
Find out what time Bournemouth v Man. City game gets underway where you are in the world.
"I am really pleased with the players - they were dogged and disciplined", he added. Firstly, the goalscorer was sent off in the 99th minute by referee Mike Dean in a decision that was perhaps harsh seeing as fans invaded the playing area, rather than Sterling actually entering the stands.
"We don't want to be going into two weeks without a game having no points, so it's huge".
The new agreement, which has already received the green light of the Spanish Sports Ministry, allows Girona to loan five players from Manchester City this season.
"It's very gutting but we can take a lot of positives from our performances", Daniels told afcbTV.
Dean then intervened to send Sterling off for his exuberant celebrations which led to fans coming onto the pitch to celebrate with their players, leaving Bournemouth pointless after three games, as City moved top before the rest of the weekend's games.
"My emotions were the polar opposite to his so it is hard to see how he is feeling, but no-one wants to see red cards in moments like that", he said.