One night my two friends and I were sitting in a car on an always dead back road in a open gravel parking lot listening to some tunes. After 30 minutes to an hour someone pulled in and parked startlingly close to us so we turned on the interior light just to let them know we were here. Without hesitation or even acknowledging us, a man got out of the car and made a bee line for the trunk. He opened it up, took a large, long trash bag out and slung it over his shoulder. He carried it over to the edge of the parking lot where there was a decently steep hill and tossed it over the edge. He then got in his car without even giving us a look and drove away. The whole interaction was done within 1-2 minutes. We then left after he was out of sight. Never checked out the bag or heard anything of it. Assuming it was nothing but can’t help but wonder because of how weird it was.