A strange thing happened with my P3 Advanced, whilst on a mission to catch some beautiful scenery. Did the usual checks, took off and idled for a few seconds to make sure everything is fine, then as the drone is about to fly over the cliff (cliff is about 200m deep), it started shaking strongly, which forced me to immediately get back to home point. Landed, power off, power on, and tried a second time, but the same phenomenon happened ! The drone was about 2.5-3 meters high before attempting to fly over the cliff. I did not want to take a chance and force it through with the risk of loosing him. Nice pics yes, but not at any cost So what's the cause for this? Thermal updraft (it was a cold day around 6-7°C on top, and not much wind)? Magnetic interferences due to the disposition of the landscape?