I guess this would apply to any model that has RTH. I am new to these t hings so bear with me. So lets say i have my RTH altitude set to say 100 feet. and HYPOTHETICALLY lets say i was on top of a mountain. and i flew down. battery life goes low and RTH engages. will the drone fly back UP and then to the 100 foot mark to return home? or would it get confused being below its starting point?