We don't fake injury (any more). Any breaks were as the result of tackles and the manager obviously wants to get points across to the team rather than just bawling out during the game when no-one listens.
Would freely admit that for the last couple of years when the game isn't going our way someone will go down with cramp etc (note, not trying to fake a bad tackle or suggest an opposition player had done anything) to do this, but we haven't done it since people started moaning about it. Both teams can make the most of the break in play - i suggest your manager uses the breaks in games to get his points across better.