A system for protecting an occupant positioned in a seat of a vehicle. The system includes a gas emitting device positioned adjacent to an occupant of a vehicle. The system also may include a controller configured to control the activation of the gas emitting device. A sensor configured to detect the vertical acceleration of the vehicle, may be included. The controller may be configured to receive a signal from the sensor and activate the gas emitting device when the signal from the sensor is indicative of a condition where the vertical acceleration of the vehicle exceeds a predetermined threshold. When activated, the gas emitting device may be configured to emit gas toward the legs of the occupant so that the force of the emitted gas directly forces the legs of the occupant to move.