Adam Le Fondre netted his eighth goal of the season has Rotherham ran riot against struggling Barnet, cruising to a 4-1 win.
Kevin Ellison opened the scoring in the 69th minute for the Millers before substitute Tom Pope and Danny Harrison wrapped up the points.
Mark Byrne netted a consolation for the Bees in the 81st minute but prolific striker Le Fondre put the icing on the cake late on.
Rotherham would have felt aggrieved to go into the half-time break level after dominating the first half.
Le Fondre went close early on before the Millers had shouts for a penalty turned down after Glen Southam appeared to handle in the area.
But Barnet's resolve was finally broken after the break when Ellison bundled home Nicky Law's corner.
Law was again the architect for Rotherham's second in the 71st minute as he rolled the ball for Pope to tap home.
And Harrison was the beneficiary for United as they netted a quick-fire third - Law crossing for the unmarked midfielder to slot home.
Andy Warrington lost his clean sheet as Byrne fired home from eight yards with nine minutes left before Le Fondre tapped in a fourth with just seconds remaining.
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