Our company has regular training sessions via the Web. One of our people were filming in a down town location with limited room. Began a mapping flight, problem was the drone was under what looked like about a 100 foot cedar tree, you can guess where the drone ended up, your right, stuck in the tree probably sixty to seventy feet off the ground. In the aviation would we would call this lack of situational awareness, and I guess we all can be guilty of it at times. As humans we can all make mistakes, the ones that don't kill you you can learn from.