Canon EF70-200mm F2.8L Lens Hood is stuck/jammed - How Can I get it Off?

[troshalom]

When I went out birding on Friday, I fell getting into the back of a pickup truck and now the hood on the EF70-200mm F2.8L is jammed. I have a UV filter on the lens that I also cannot unscrew.

Both the hood & filter were easy to screw on moments before I was getting into the truck. I didn't fall on the lens. The camera was in my camera bag, but since I had the 2x extender on the lens, the top part was sticking out of the bag and when I fell, the bag tipped over.

How can I get the hood off without breaking it?

[Tintype_18]

Fine threads are easily cross threaded. I turn one of the two parts backwards until I hear or feel the "click" where the starter threads are lined up. Then proceed to turn the part to seat it.