I found this video and find it important to share. Drones can have failures and malfunctions for several reasons. Especially with UAV's it's important to be aware of potential pitfalls because every incident can be fatal, both for people and your wallet. For that reason I want to share the following video. Do not just watch it but also learn from it, especially if your own a DJI Phantom model. Some of the crashes could have been prevented!
For more information about safe drone operation, check out: http://knowbeforeyoufly.org