My daughter was trying to get into the backseat of our Kia Telluride. She had one leg raised with her knee resting on the stepping area inside the rear passenger door. While in this position, she pressed the handle to fold the rear seat. The lower portion of the seat suddenly swung forward and closed with fast, strong force onto her folded knee joint, pinning it between the moving seat and the vehicle floor. She screamed immediately in pain and could not free her leg. I had to run around to the opposite side of the vehicle (the rear passenger side) and physically lift the seat off her knee to release her. The impact left a noticeable bruise just above her left knee. The folding seat mechanism appeared to move too quickly and with excessive force, and it did not stop or slow down once it encountered her knee. This presents a potential safety hazard, especially for children or passengers entering the vehicle who may accidentally activate the seat handle.