The Red Devils striker, who is currently out of action with a thigh injury, made the revelations in his new autobiography which marks 10 years playing in the Premier League.
United manager Sir Alex is famous for having a temper, but Rooney’s book has revealed the extent of the 70-year-old’s tirades, and just how the players feel when on the receiving end.
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“There’s nothing worse than getting the ‘hairdryer’ from Sir Alex,” said Rooney.
“When it happens, the manager stands in the middle of the room and loses it at me. He gets right up in my face and shouts.
“It feels like I’ve put my head in front of a BaByliss Turbo Power 2200. It’s horrible.
“I don’t like getting shouted at by anyone. It’s hard for me to take, so sometimes I shout back. I tell him he’s wrong and I’m right.”
The 26-year-old also admitted that the United players did not escape the hairdryer even when they had won the league title and were going to lift the trophy.
The Red Devils won the title in 2006-07 with two games remaining but suffered a last day defeat to West Ham, and Sir Alex tore into the players just before the presentation.
“Most sides would be celebrating in the dressing-room, getting ready for the champagne and the photos,” said the England international.
“Not us. We’re staring at the floor like school kids, the manager giving us the ‘hairdryer’.
“After the rollicking it takes a while before everyone cheers up enough to put their Premier League-winning smiles back on.”