Mr Steele's failsafe when diving a building [2], Reddit discussion [3]
Nurk's train video (for which he was fined by the FAA) [4]
But surely, those trained professionals that learned how to solder wires to the ESCs can't be dicks.
[1] https://www.youtube.com/watch?v=TJgRuMXBHHI
[2] https://gfycat.com/freshthisinsect-multicopter
[3] https://old.reddit.com/r/Multicopter/comments/5hajmh/lets_al...
[4] https://www.youtube.com/watch?v=nQDcDZ6rmGE