Epic drone crash from 400 Feet starts at 1:24.
I crashed my drone (Walker QRX 350 Quadcopter) from just under 400 feet. Luckily, the quadcopter, gimbal, and Gopro Hero 4 were all pretty much fine. After the drone crash, I inspected the quadcopter and saw that the wire between one of the motors and the speed controller became unsoldered (possibly due to a poor soldering job on my part). This was likely the cause of the quadcopter's crash. I replaced the speed controller and soldered it to the motor, and after that the drone was back and running at 100%.