Reds 4 (Vaz Te 17, 51, 71 Davies 60)
Leeds Utd 1 (Becchio 90+1)
A rampant Reds tore into a sorry Leeds United with Ricardo Vaz Te bagging an amazing hat-trick after springing from the bench.
When Leeds hacked through Butterfield it seemed an already patched-up Reds side would struggle without their skipper, but his replacement Vaz Te scored just two minutes after his introduction.
As expected, it was a fast and frantic opening but with neither side giving too much away the first shot didn't arrive until the eighth minute when Keogh flashed just wide.
Again it was the visitors who went close seven minutes later through Nunez just after Michael Brown had scythed through Butterfield - who was eventually replaced by Vaz Te.
Just two minutes after the Portuguese forward's introduction, a great advantage from Neil Swarbrick after Davies was hauled down by the last man allowed 'Vaz' to capitalise and slot past Lonergan with a cool finish.
Barnsley were lifted and almost doubled their lead on 21 minutes through Done, but the little forward couldn't get a proper connection when found unmarked by Vaz Te's delivery.
The threat from the visitors seemed to always come from Nunez and the winger forced Steele into save with a swirling 25-yard drive.
There were three bookings in total during the first half - all for Leeds players as the Reds flew forward. It was clear what the away side's game-plan was and Hill's side had already lost their captain.
A couple of deep crosses had to be dealt with by Steele and his defenders, but in the latter stages of the half Leeds' early enthusiasm seemed to have fizzled out.
Davies, who was working hard and holding up the ball well, blazed over a seemingly simple opportunity from 15 yards. McNulty switched flanks to Hassell who bombed forward, prodding towards Wiseman to deliver and the ball eventually fell for the former Spireite but he was leaning backwards and scooped over with his right peg.
Steele had to deal with a soft Keogh header minutes before another long-distance Nunez effort but the Reds had a slender half-time lead and it could have been more.
Six minutes after the break Ricardo Vaz Te hit another when he controlled a loose corner before forcing over the line despite Leeds' best attempts to clear. Another goal came nine minutes later and in some style - Craig Davies rewarded for his tireless display when he curled an absolute peach into the top corner with Lonergan simply an admirer.
With confidence oozing from the Reds, a similar chance for Davies went inches wide and Leeds were all over the shop - undone again with ease on 71 for Vaz Te's hat-trick.
When Hassell swept out wide to the former Bolton attacker, a terrific chest forward set him away and he kept his cool when one-on-one with Lonergan. What a goal.
Grayson's men looked lost and bewildered but salvaged some pride, if any, when substitute Becchio nodded home Nunez's delivery in stoppage time.
Leeds must simply hate coming to Oakwell - a rampant display from Hill's warriors. Terrific match.
Reds: Steele, Hassell, McEveley, Foster, Davies, Done (Gray 78), Perkins, Wiseman, McNulty, Addison, Butterfield (Vaz Te 15).
Subs: Preece, Edwards, Noble-Lazarus.
Leeds Utd: Lonergan, Connolly, Kisnorbo, Vayrynen (Clayton 54), Brown, Pugh, Nunez, White, Keogh (Becchio 54), McCormack, O'Dea.
Subs: Bruce, Sam, McCarthy.
Referee: Neil Swarbrick
Assistant Referees: Andrew Garratt & Glenn Turner
Fourth Official: Carl Boyeson
Attendance: 17,499 (5,760 away)