Ask a group of Manchester City fans to pinpoint the moment they realised the fortunes of the club were changing and you'll likely get many different responses.
Sheikh Mansour's purchase of the club in 2008, shortly followed by the British transfer record signing of Robinho, seems an obvious place to start.
Or maybe the FA Cup semi-final in April 2011, that saw City defeat bitter rivals Manchester United on their way to winning a first major trophy in 35 years. And how could anyone not mention the AGUEROOOOOOO goal that won the title in 2012?
For me though, the derby day demolition of United on 23rd October 2011 was the moment.
Usually, it wouldn't seem appropriate to attach such significance to a game against a title rival so early on in the season. Yes, it was United and not just any old title rival, but the fact is that had City lost that day at Old Trafford, they may well have gone on to win the league anyway. But that scoreline...
As a 14-year-old who had grown up fearing those post-derby day school mornings, when my seemingly innumerable United-supporting peers would mercilessly poke fun at little old City, I feared the worst that day.
After the delight of the FA Cup win a few months before, City had re-discovered their innate ability to implode against their neighbours, blowing a 2-0 lead to lose 3-2 in the 2011 Community Shield.
To make matters worse - to this day I have no idea what I was thinking- I had agreed to watch the game at a friend's house with two United fans. We didn't have Sky Sports at our house, so needs must.
After the opening 10 minutes, I was already plotting my escape route - the key was in the lock, but there was a patio door to negotiate too. Could I nip out the back? I'd have to be careful not to let the cat out. United looked good and, like in most derbies away from home at the time, we looked nervous.
Then something strange happened: we scored first. Mario Balotelli's famous celebration seemed to inject a certain swagger into our game and suddenly we were running the show.
Shortly after half-time, Jonny Evans was sent off but by then there was only one team that was going to win. We smelled blood and absolutely went to town.
The grin on my chubby pre-pubescent face grew wider and wider as the Reds either side of me sank deeper and deeper into the sofa. I'd never heard United fans go silent during a derby before, or witnessed a respite in the near-constant taunts and jokes at City's expense. That just didn't happen.
When United pulled a goal back with 10 minutes to go, the pit of my stomach felt like it was made of lead. It was happening again, wasn't it? Another inevitable United comeback. Images of Michael Owen wheeling away in celebration clouded my vision.
The final three minutes of the game blew my tiny little mind. We weren't merely content to scrape a rare derby win, happy to take the bragging rights for a few months before coming back to earth with a thud like in years past. We were there to take over, to humiliate our tormenters on their own turf.
The scoreline, 6-1, was of course hilarious. At that point we were just about accustomed to scoring six goals against the likes of Portsmouth and Norwich City, but against United? It was absurd.
As I mentioned at the start of this piece, in the wider context of that season, the scoreline probably didn't really matter. We won the title on goal difference, the 10-goal swing caused by the 6-1 ultimately proving decisive, but nobody knows how the rest of the season would have gone had the result been different.
However, in the grand scheme of things, taking United to the cleaners was incredibly significant. More so than beating them at Wembley, it signified a changing of the guard.
City's derby wins in the years before that had usually come about simply because United had played badly but, from that point on, City would be setting the agenda.
By winning 6-1, City put United in their place. Despite the odd bit of success in the decade since, they haven't recovered.
What do you remember about the day City beat United 6-1? Follow City Is Ours writer Alex Brotherton on Twitter to join the conversation and let us know your thoughts in the comments section below.
