Key to the bounce rooski is that everyone on the offensive team has to pretend that it is an incomplete pass. This typically happens with the receiver never starting motion, all of the offensive players stopping and leisurely returning to their places on the line, and everyone basically relaxing. If the fake is successful, when the defense does the same, the receiver can run off unopposed, or, as it was a lateral pass, make a forward pass after the receivers have had ample time to move far down the field.