My brother's phantom recently came crashing out of the sky from what appeared to be a motor failure from what I could tell while there. The phantom was leaning to one side and came down to the ground and crashed. We sent it in and were told that it crashed due to a vortex ring state which can occur while hovering. Ive heard of this occurring while descending but not from hovering. Ive let my phantom hover for several minutes and never had a problem and I thought this problem was fixed in one of the recent software updates as far as decent speed goes anyway?