Sheffield United manager Chris Wilder says his assistant Alan Knill picked a verbal fight with him after Manchester United scored a third goal on Sunday.
The Blades got off to a brilliant start at Bramall Lane, with John Fleck turning in from close range after 20 minutes.
After Lys Mousset doubled the lead just after half-time, it looked like Sheffield United would be out of sight, considering how poorly the Red Devils were playing.
However, United sparked a brilliant comeback with 20 minutes to go after grabbing three goals in the space of seven minutes.
Brandon Williams, Mason Greenwood and Marcus Rashford all scored to overturn the lead.
But Oli McBurnie popped up inside the area to level the game in the dying minutes to give the Blades a much-deserved point.
Speaking afterward, Sheff Utd boss Chris Wilder revealed what he told assistant manager Alan Knill before the game finished.
Wilder discussed how the game changed once they started to take risks going forward.
“I felt there was something in it for us especially after we switched it up towards the end. In the end I’ve got Alan taunting me about shutting up shop and I’m going ‘I think we can win this’, a bit like Escape to Victory,” Wilder said.
“All of a sudden, their front door came alive and the game changed in eight or nine minutes. Yep [Sheff Utd were dominant]. In and out of possession we felt comfortable. I don’t think we took a step back. I think you’ve got to take risks; you’ve got to take chances,” he added.