Leyton Orient boss Russell Slade hailed his side's "incredible will to do better" after they stretched their unbeaten league run to eight games with a derby win over Brentford.
Second-half goals from David Mooney and Shaun Batt ensured the O's first win at Griffin Park for 20 years and made it 16 wins from their last 21 games.
Mooney struck first just after the hour when he was hauled back in the box by defender Shaleum Logan, and got up to fire his penalty into the bottom corner.
Batt sealed the points five minutes from the end when he raced onto a slide rule Moses Odubajo pass to coolly slot home beneath keeper Richard Lee.
Slade said: "We got in at half-time and said to each other that we could do better. After the break we stepped it up and deserved the win.
"There is a real togetherness in this squad. We are a small group and each one of them knows exactly what they need to do for each other."
He added: "There are no energy suckers in the side. They are all energisers and they all know that our form is based around working as a team and an incredible shared will to do better."
Promotion favourites Brentford looked like a collection of individuals against the dogged east Londoners, who always looked dangerous on the break with Kevin Lisbie's pace a constant threat.
Slade admitted: "Brentford looked the better side in the first half. They have a big squad and are going for promotion, but we knew we could do better and we did."
Frustrated Brentford boss Uwe Rosler agreed his side had the edge in the first half, but needed to steer clear of unnecessary mistakes.
"There were a lot of positives but all the time we say we can't afford to let in the first goal and we keep doing it," he said.
"I was disappointed with our reaction after Orient scored when we kept going long instead of trying to play ourselves in with patience. That was very disappointing, but I am not going to slate my players."
Rosler admitted his side - he has used 29 players compared to Slade's 18 this season - were behind where they wanted to be at this stage of the campaign.
He added: "I told them we were looking strong in the first half and to keep doing the right things, but you can't afford to make a mistake like we did for the penalty against a good side like Orient."
Orient always looked capable of carving out the better chances, and Mooney might have put his side ahead inside the first 20 minutes but contrived to head Odubajo's chipped cross over the bar from close range.
He wasted another gilt-edged chance on the half hour when he fired over after a mix-up between keeper Lee and centre-back Harlee Dean.
But in the end it was comfortable for Orient, whose keeper Jamie Jones was largely untroubled.