James Beattie's double saw the Blades consolidate their position in the upper echelons of the Championship after a deserved 2-1 success against Barnsley in a pulsating clash at Oakwell in November 2008.
In a game that saw two red-cards, a penalty and Tykes boss Simon Davey banished to the stands, Beattie's sixth and seventh of the season paved the way for three more points as United extended their unbeaten run to five matches.
Ugo Ehiogu and Anderson De Silva were the players to be dismissed after the pair both appeared guilty of throwing head butts at each other on the half-hour mark.
Beattie's first came following some good work by Webber who turned Colace and put the ball on a plate.
The striker's second was from the spot after former Blades favourite Rob Kozluk handled Chris Morgan's pump into the penalty area.
Barnsley: Muller, Kozluk, Hume (Mostto 35), Colace (Rigters 89), De Silva, Souza, Whaley, Campbell-Ryce, Devaney, Hassell (Odejayi 68), Moore.
Unused: Van Homoet, Leon.
Blades: Kenny, Naughton, Ehiogu, Morgan, Sun, Spring, Speed, Quinn (Montgomery 87), Webber (Halford 73), Beattie, Stokes (Kilgallon 33).
Unused: Cotterill, Sharp.
Attendance: 19,002
Referee: A D'Urso