An open roof assembly for use in a vehicle roof of a vehicle comprises a moveably arranged closure member for selectively covering or at least partially exposing an opening in the vehicle roof. Further, an electric motor operatively coupled to the closure member is provided for moving the closure member. A control unit is operatively coupled to the electric motor for controlling the closure member. The control unit is configured to control a position of the closure member during normal driving conditions, and to release control of the position of the closure member, when a vehicle acceleration exceeds a predetermined acceleration threshold. Thus, upon a high force on the closure member, induced by the high acceleration and weight of the closure member, damage may be prevented by absorbing the high forces in a motion of the closure member and a resistance of the electric motor.