I was a the beach. It was Independence Day, so we had a vacation. After dinner, we saw a green light on the beach. I thought it's a toy brought by a guest at the hotel. It rose, and then it moved from north to east, rising while turning. It sounded like a helicopter. What i hadn't seen earlier was a dark oval shape behing the green light. I feared being abducted. I began to chase it. I then lost sight of it as I went back to the hotel room.