One of the guys I work with learned a lesson the hard way yesterday. He went into our lockup area where we fill our small nitrogen tanks and was messing around, a few minutes later he came out and was cussing and holding his jaw. He decided to turn on the valve on the large K tank and the braided stainless hose bullwhipped him in the face. I asked why he did that and he said " wanted to see if there was anything in the tank". His favorite thing to say is "I may look dumb, but I am highly intelligent." Not today!!!!