I have a gas line to a gas range I'm trying to take off. The nuts are very tight. In the photo there are 2 nuts. It looks like the upper one is attached to the gas hose (the flexible hose). Using a very long wrench I'm able to loosen the top nut. But, strangely the hose also spins with the top nut. I expected the top nut to spin freely from the hose. So, loosing the top puts a kink into the gas hose. I'm afraid that the kink will push pressure on the hose and cause a gas leak. What should I do keep spinning the nut with a wrench without destroying the gas hose?