Conventional wisdom wasn't wearing a uniform Sunday at Ralph Wilson Stadium.

"That's why you play the game," said Bills tight end Robert Royal after the Bills' 27-24 upset of the Jacksonville Jaguars. "To win in this league, you just have to execute, play hard and play smart. They've got a great defense, but that's what we did - we played a smart, tough game."

There were three big reasons the Bills pulled off their biggest surprise of the season:

• They got a spectacular, highlight-reel touchdown on an 82-yard punt return by Roscoe Parrish.

• The offense produced in the clutch, with quarterback J.P. Losman engineering his second last-minute, game-winning drive in two weeks.

• They played close to an error-free game, tying the Jaguars with one turnover and making just four penalties to the Jaguars' 10.

A crowd of 63,608 on a balmy day in Orchard Park watched Rian Lindell kick a 42-yard field goal on the last play of the game to win it. It was the first time in a year the Bills won back-to-back games and the first time in three years they won a game on the final play.