A late goal from substitute Barry Corr snatched Cambridge a 4-3 win against Cheltenham in a sensational Sky Bet League Two clash.George Lloyd scored his first senior goal for the visitors inside three minutes before Greg Taylor equalised from Jevani Brown's corner.Mo Eisa's superb free-kick restored the Robins' advantage with the game still only 13 minutes old.In first-half stoppage-time Medy Elito blazed a Cambridge penalty way over the crossbar amid controversy, as referee Brett Huxtable awarded a spot-kick for a foul on Brown despite Billy Waters scoring as the ball fell to him.The U's did get their equaliser after 53 minutes when Brown fed George Maris, who drilled a fine effort across Scott Flinders for his fourth goal in five games.Brown then sent Flinders the wrong way from the spot on the hour after Jordan Cranston conceded his second penalty by fouling substitute David Amoo.Eisa looked to have earned Cheltenham a draw with his second goal 11 minutes from the end but Corr struck the winner moments later to settle a superb encounter.