There is a dam fairly close to where I live. I'd love to do an aerial video. However, I'm a bit worried. if I park the car next to the dam, I'd be slightly looking down on it. I've added a picture I took a while back. so if I take off and start over the water then fly over the dam will the drop confuse it or will the quads height be calculated from where it took off? and secondly if I flew down in to the dam on the right hand side the quad will be lower than its take off height so how would it react?! Hope this isn't too confusing lol.