An unmanned aircraft configured to fall or crash in a controlled and safe manner. The unmanned aircraft includes a drive system to thrust the unmanned aircraft during a flight, and a reverse thrust system to reverse thrust the unmanned aircraft during a landing. The unmanned aircraft further includes a controller operationally coupled to the reverse thrust system, and a detector to detect and notify to the controller that the unmanned aircraft is in an uncontrolled situation during the flight. The controller is adapted to activate the reverse thrust system in order to reverse thrust the unmanned aircraft in-flight upon notification from the detector that the unmanned aircraft is in an uncontrolled situation.