If you're controlling a quadcopter, one limiting factor is how fast the rotors can accelerate/decelerate.
That is, the derivative of rotor thrust.
That is, the derivative of angular acceleration of the vehicle.
That is, the third derivative of the angle of the vehicle.
That is, the third derivative of the horizontal thrust of the vehicle.
That is, the third derivative of the horizontal acceleration of the vehicle.
That is, the 5th derivative of position.