Unfriendly flying, beating the !!!! out of a compound. I’m sure those inside were intimidated by the tapping of the blades on the roof. Looked to me like the blades were already way coned, yawing right, descending -signs of overpitching and rpm loss- before the gear inevitably snagged something. And crazy maneuvering in a limited power helicopter, everything wrong that we teach not to do. Must be a Brazilian military thing. Darwin.