While doing some tests with my hexacopter at 20 meters of altitude, my incorrectly secured enormous battery failed at being part of the vehicle and decided to plummet down towards earth at impressive speed, the hexacopter of course was trying to catch the battery, but only did it when they where both at the ground.
An excellent example of a face-palm moment.
Secure your batteries properly, and remember to fly safe!
Lucky it wasn’t flying above the lake…