be dangerous and can cause you, your family, and your property damage. check this by starting the closing process. as the door is lowering, hold the bottom of it with your hands outstretched and rigid. if the door does not reverse, as it should, and continues to close, pull your hands away quickly. allow the closing to complete so as not to injure yourself. what you have done is determine that the closing force is too high and garage door repair is necessary. 