I have never seen one, but my brother walked up on one while hunting deer this last fall. He didn't have a rifle (his friend was the one with the tag, and hence the rifle, he was helping out and enjoying the walk in the woods), but he did have a small handgun. He fired a warning shot, and the cat ran off. He is still a little shaken from seeing such a big cat up so close. He laughed at me when I brought bear spray on our last trip (last fall), now he claims he won't go without a gun, not for bears but for lions.

From what I have read and seen, actually seeing a cat is rare, they are very good at not being seen.