While standing at the rear of auto with power lift hatch open.. i was moving some objects around and noticed that the hatch was closing , being startled a was getting pinched into the opening by the hatch door.. i pushed real hard with my back and did escape serious harm, now i'm watchful when in the back and hatch is open and i'm under the door.. it does start coming down slowly after being open for a couple of minutes.. very dangerous.. please advise.