A break-away wiper arm assembly which allows a vehicle escape window to be opened rapidly without any delays or undue forces to impede the escape of the vehicle crew. The invention uses a two piece coupling held together using a retaining ring. As the window is pushed open, the window frame pushes against the wiper arm which overcomes the retaining ring retention force allowing the wiper arm to break away, clearing the area in front of the window for free motion of the window and the unimpeded exit of vehicle occupants.