IAN Holloway confirmed he would discipline Matthew Briggs after the left back contributed to his own sending off by removing his shirt celebrating a goal.
Briggs, making his first competitive start for the Lions, scored the only goal of the game in Tuesday's victory over Wycombe Wanderers in the Capital One Cup.
The 23-year-old ripped off his jersey after breaking the deadlock in the 27th minute before being shown an inevitable yellow card from referee Andy D'Urso.
And then early in the second half, Briggs picked up his second booking for a late tackle.
"I'm going to have to discipline Briggsy," Holloway said. "That was pure emotion because of the hard time he's had and suddenly he's scored a goal.
"But you've just got to keep your shirt on, haven't you? He should have shoved his face in the dirt or do something that he wasn't going to get booked for.
"It was totally unprofessional.
"The second foul was also a booking but it wasn't deliberate and the referee had let a lot of things go, especially in the first half.
"I can't argue about it because Briggs should never have taken his shirt off. The second one was clumsy.
"To be honest if I had a body like that I'd probably want to take my shirt off.
"But I wouldn't do it, with the discipline that I've got, if I know that it's going to be a yellow card.
"If you know what the rules are, why do it? So as a manager I'm fuming with that. He's upset but it's an emotional game so let's hope he learns from it.
"I'm delighted Briggsy scored and by the end of his time with me hopefully he'll have scored so many that he won't bother to celebrate them – he'll just jog back to the halfway line."
Briggs has since taken to Twitter to express his regret at the incident, writing: "I want to apologise for getting sent off and for my celebration!
"Silly booking, my emotions got best of me. WONT HAPPEN AGAIN!!"