Bantams midfielder Andy Halliday has called City's 'unbelievable' victory over Chelsea this Saturday one of his best moments in football.
Halliday, who turned a loan deal with the Bantams into a permanent move this week, scored the third of City's four goals at Stamford Bridge to help Phil Parkinson's men sensentionally come from two goals behind to dump Jose Mourinho's Blues out of the F.A Cup.
City's prize for knocking the seven-time winners out of the world's most prestigious domestic cup competition is a place in the fifth round draw for the first time since 1997.
Halliday said: "I've never felt anything like that on a football park.
"To come from two goals down at Chelsea, arguably one of the greatest teams in Europe, makes it hard to put into words what we have achieved. I don't think you'll see a better second half display from an away side at Stamford Bridge all season.
"I thought we were unbelievable in the second half. We scored three after the interval and it could have been more - we were outstanding.
"Some of my family are from Croydon and their team is Chelsea and they were at the ground to see the game.
"They were in the Bradford end though and I'm sure they were rooting on Bradford. It was just an unbelievable feeling to score in front of our supporters.
"I have to saviour this because I don't think I'll experience many more moments in football much better than this.
"This game (vs Chelsea) was my first as a proper Bradford player and already we've reached the pinnacle! All jokes aside, hopefully there are many more moments like this to come but this will take some beating.
"Even at two goals down, we just said to ourselves that we have to stay in this as long as possible.
"Getting the next goal after that was vital and we knew we would create chances in the rest of the match.
"Chelsea showed us respect by playing a strong side and they showed that they wanted to win this competition. They started with big names on the pitch and they then brought even bigger ones on as substitutes. To go and win it after that then is an unbelievable feeling."