The only scary time i had with the modern dji drones was in the early days when I was flying one about 1 mile away and all of a sudden something interfered with the drones systems and it was totally lost and proceeded to try to return to me by speeding off in the wrong direction, alarms going off all over the place and all the readings including height was screwed. Luckily i manged to get signal back and gain manual control over it and fly it back to me.