It's always difficult to comment after an accident where someone has died or been injured.
My big thought regarding this is if you are tracking an moving object for a purpose such as this then you should do a thoughrough check of the area before hand to identify hazards such as wires / trees etc. Even if you do that it is still so very easy to become focused on the target and miss / forget the peripherals.
"There but for the grace of God tread I"