Apparently these are called "stovepipe" nests. I've done a few of these, but never one that tall.A few years ago my dad got stung in the head by four hornets while he was chopping some wood. After 10 minutes he collapsed and started to vomit, lost his sight and went to anaphylaxis. He was completely alone in the woods except for our dog Dero that started to bark and never left him. Thank god my dad always hated everything that was even slightly "digital" and still had one of those old Nokias with real buttons. He started to count the numbers with his thumb and manged to call an ambulance. They found him because they could hear Dero barking in the woods and saved him with an adrenaline injection. He was really lucky, these bastards are really dangerous.