Dennis Wise breathed new life into Millwall as they ran out easy winners against league leaders Sheffield United before being sent off after being on the pitch for just four minutes.
Wise, in his first game in charge following the sacking of Mark McGhee, put himself on the bench but came on in the 84th minute with the Lions were already down to ten men.
But he barely broke into a sweat before Rob Styles sent him to join David Livermore for an early bath after Wise was adjudged to have lunged into Chris Armstrong with a late tackle.
Livermore went earlier for a second yellow after Neil Harris and Paul Ifill had put Millwall into an unassailable 2-0 lead.
Harris scored from the spot in the 52nd minute after Rob Kozluk felled Abou Fofana in the box.
Ifill made it two on 66 minutes when his shot from a tight angle was palmed goalward by Blades keeper Paul Gerrard.
The whole team, who looked disinterested the previous Tuesday against Preston, were rejuvenated under Wise's leadership.
Wise was given possibly the first standing ovation in his life when he came on - and another one when he left.
He insisted the sending off had not spoiled his day. He said: "It was fun and me being sent off did not spoil the day.
"I am disappointed with Rob about my sending off but he had to do what he felt was right.
"Eventually I want to be a manager but I would like to do my apprenticeship first. The chairman had better find someone after these four games and I am sure he will. He's had a good number of applications put forward." Sheffield United boss Neil Warnock said: "We were fortunate only to lose 2-0. I can't blame anyone but the team - we were poor. We came on the wrong day, because everything was geared up for them."