Here's my sad experience I just had earlier (110% my error, luckily minor damage to the aircraft): So I had planned a flight today at a very nice park on my city, its a very popular recreational park that was built around a dam at the outskirts of the city, there's excercise machines, running/bicicle tracks, a zip line frome one side of the water body to the other, you can rent boats, water motos or use your own boat, you name it.. I looked for a nice spot, I asked the security staff if it was ok to fly the drone at the park and they were absolutely fine with it. (I was worried I wouldn't be allowed to fly at all) Took it out, calibrated compass and accelerometer, I was so excited that I didn't notice I made a Major mistake, and took off on smart mode while standing close to the H. I don't know how I missed it, I've got to say I'm pretty mad at myself right now. Anyway the H immediately became irresponsive, I had it just lifted it over a couple meters as I always do to check it's stability and responsiveness before sending it away. I kind of kept a bit of control, but since I freaked out I didn't notice the bright green light that anyone would assume is the first thing I sould've noticed. I guess that since I never fly on smart mode my brain some how overlooked it (also since I immediately got my memories from my nasty last crash I wasn't thinking right) Anyway, It started moving away from me, until it got just a couple of inches away from a steel post nearby. At that moment I got close to it and trying to get ahold of it on the air to pull it and kill the motors, when it slowly came in contact with the post. Long story short: it fliped and fell from the "platform" I was standing into the grass below, busted 2 propellers, 3 dampers popped out (luckily the gimbal rails held fine this time) but unfortunately 2 wires from the camera pulled and broke. It did enter 5 motor mode, however the ship was built so that she would stay afloat with 5 operating propellers, not 4 (excuse the lame titanic reference) I'm pretty sure I hit the record button when I took of, so its possible that the footage is in there. I have to be honest I broke the rules after that ; one of the propellers broke very symetrically, and since there was no visible vibration from that motor I tested it and I got to fly normally after my mishap, however it was a cameraless flight, (I've got to say though that the battery lasted a very long time without the extra weight and the camera feed) Sadly I no longer have prop spares so I'll have to order some (pay an unfair shipping cost all the way to mexico) and wait to fly again Right now I'm in the process of soldering back those loose wires, hopefully I'll be able to share this sad incident with you, and HOPEFULLY it will serve to me as a reminder of that dreadful smart circle of death. As you can see the flight path is absolutely ridiculous, anyone who could've seen me would've tought it was one of the most ridiculous crashes. But it was the smart circle doing its weird job. Luckily I chose a good location without any bystanders, later when I flew it (with a damaged propeller) the H did draw some attention of people who got close to watch the H soaring through the sky. Greetings!