Millwall manager Kenny Jackett praised Shane Lowry for the Gareth Bale-style free-kick that clinched a 2-0 npower Championship victory at London rivals Charlton.
Substitute Jermaine Easter marked his first Lions game since arriving on loan from Crystal Palace with the opening goal - which was also his first touch.
And the FA Cup semi-finalists, who will play Wigan at Wembley next month after beating Blackburn in a replay last week, made sure of three points when defender Lowry beat Addicks goalkeeper David Button from more than 30 yards out.
Jackett said: "I can't say he's been practising that but it he showed fantastic confidence.
"There was no disguise on it or a runner over the ball - he just took the responsibility and did it on the day. It was a fantastic free-kick - the keeper had no chance.
"If I sit here and compare Shane to Gareth Bale people would have a field day but it's one thing doing it on the training ground and taking one in front of a crowd."
The setback was Charlton's ninth defeat of the season in front of their own fans and the Addicks already had the worst home record ahead of kick-off. Manager Chris Powell admitted he had no idea why this was so.
He said: "I'm mystified by it to be honest. I'm baffled. I'm embarrassed for my players and for my supporters because we have tried everything with regards to performing at home.
"We had a good first half, we stood toe to toe and had a penalty claim that wasn't given and within a minute we were a goal down. Of course goals change games and we ended up chasing it. It was an outstanding goal by Shane Lowry and we ended up losing.
"We created the better chances but you have to take the ones that come your way. It didn't happen through good defending, good goalkeeping or us not hitting the target. We have just got to soldier on."