he fell on his own

A man in a white long-sleeved shirt and jeans stands on a low concrete wall, then jumps off onto a paved sidewalk, landing on his back. Another man in a plaid shirt and shorts, standing on the sidewalk, turns and walks toward him as he lies on the ground. The man on the ground then gets up and walks away. The scene takes place outdoors on a sidewalk next to a street with cars and a scooter in the background.