Derby fans turned on manager Nigel Clough as injury-hit Doncaster consigned them to a 3-1 defeat - their fifth in a row at home in the npower Championship.
Billy Sharp scored twice as Rovers, down to the bare bones due to a lengthy injury list, ended a run of six games without a win to ease their relegation fears and leave Derby looking anxiously over their shoulders.
The Pride Park faithful reacted angrily to Clough's decision to bring off Theo Robinson just after Sharp's second goal, with chants of 'You don't know what you're doing' and the boos rang out as Joseph Mills added a third goal. Paul Green pulled a goal back right at the death but the damage had already been done.
The Rams were caught napping as Doncaster took the lead with a goal that came out of the blue. A long punt from Martin Woods was not dealt with by the home defence and Sharp raced clear before firing clinically into the bottom-right corner with his right foot.
There was worse to come as Rovers doubled their lead two minutes after the break. John Oster was the architect, jinking his way to the byline before standing a cross up to the far post where Sharp nodded home at the near post. Sharp should have completed his hat-trick when he raced clear after being picked out by Franck Moussa, but the diminutive strike dragged his left-foot finish wide.
Derby had totally lost their shape and Rovers cashed in 20 minutes from time when Mills surged forward and lashed a left-foot drive which Frank Fielding got a hand to but failed to keep out. Green pulled a goal back in the 90th minute when his cross, aimed at Steven Davies, eluded everybody and went in, but it was never going to be any more than a consolation.