So I was going across the top of a hill and the belt kicked off under the machine to my surprise I went down the hill and almost into a swamp. Almost had to change my underwear after that. So as I lay under the machine with the radiational heat from the muffler cooking my face and my gloves about to melt from the heat on the shaft, I pondered the question out loud---How the F@*K did this happen. The next day i went to my power equip guy the belt was tight and arm working fine.. Happen to anyone else?