Definitely high winds. Our farm got hit by a tornado this spring and it is amazing to see the devastation. On Sunday of 1st gun season this year, a huge front blew in just before light. Fortunately, I had gotten back on the ground before the strom blast hit, but my buddy was still 25 feet in the air. His tree blew over and hit the tree next to it, about 7-8 feet. He ended up bear-hugging his tree, his climber cut out and he slipped down about 4 feet. Needless to say, he emptied his drawers and climbed down. I' m guessing that the front edge of that storm had 50-60 mph winds.