Anfield's tribute to the 96 victims of the 1989 Hillsborough stadium disaster ended on a nasty note Sunday when feuding Liverpool and Manchester United fans played out a traditional ritual of confrontation and heckled each other distastefully from the stands.
Some time after the final whistle, when most Liverpool fans had left, a couple of home supporters ran across the main stand to the far corner, where the visiting United contingent remained on police orders, and started making airplane signals.
It was an obvious reference to the Munich air disaster in 1958, in which eight United players were amongst 21 people who lost their lives.
United fans responded immediately by chanting "Always the Victims" and "Murderers" in a reminder of the Merseyside club's own recent tragedies -- Hillsborough and Heysel.
Social networking sites were flooded with responses as the bitterness spilled over, and Liverpool manager Brendan Rodgers could shed little light on what happened.
"What was done at the end I cannot comment on as I didn't hear or see anything," he said. "There is an intense rivalry here and you don't want that to end because that is all a part of what makes this the biggest game in British football. But it is on the field where competition should be and everything else, songs from Liverpool or Manchester supporters, any of us that have any human decency don't like to hear that."
All the Liverpool manager could say was that the battle against those who let both clubs down will go on.
"The fight will go on if there is a continuation of that but certainly at this club the work that has gone on in the last couple of weeks is something I am very proud of and the tributes today were fantastic," he said.
Indeed, Rodgers was keen to praise the fans of both clubs, noting United supporters applauding prior to the game when a tribute of thanks was read out for the Hillsborough families whose campaign to discover the truth of what happened in Sheffield 23 years ago has now been fully vindicated.
"I think the supporters were absolutely phenomenal," he said. "It was a significant day and the respect which was shown both teams, and with everyone shaking hands, and just moving forward is important. People who value human decency and humanity will have been proud today because it is important we move on from a lot of the negative stuff.
When they entered the field prior to kick-off, both sides wore track suits with the number 96 on the back.
Sir Bobby Charlton then presented Ian Rush with a bouquet of flowers before respective captains Steven Gerrard and Ryan Giggs released 96 balloons before a mosaic was unveiled which ran across three sides of the ground.
"The most important thing today was respect," said Evra. "It was a game between two big clubs.
"There was a big tragedy," he added. "People were talking about a handshake but the stories of the clubs is bigger than that. If I hadn't shaken Suarez's hand, I would not be respecting the stories of the clubs. In the end I am glad this time he shook my hand. More importantly, it was important to respect the families. It was not an easy day."
United officials were unavailable to make an immediate comment on the post-match difficulties.
However, without being asked about them, Ferguson said he felt the day had gone well.
"Liverpool FC have done a fantastic job," he said. "The fans were terrific. Our fans paid back that respect. I don't think anybody could have any complaints about that part.
"It demonstrates that two great clubs can unite and do these things and then get on with the game of football with both teams trying to win," he added. "It was ferocious and intense. The supporters got behind their teams in the right ways which was great to know. It has been a day for football.
Ferguson, who before the game urged an end to the hostilities, said English football's most storied clubs deserve much better than rival fans trading tasteless insults.
"We have had to endure that for years and years," he said. "It is a sick part of society but it is only a minority from every club. They all have an element who can disgrace their club."
Information from Press Association was used in this report.