This picture slide show is on the Denver Post. I just thought it was really interesting. A lady had a mountain lion come to her door, and she took pictures of its encounter with her house cat. Fortunately, her cat was indoors, and they just looked at each other through the glass door.
Wow, those are some cool pictures. You could see the hair raising up on the indoor cat's back a bit in the first pictures. Good thing the house cat was in the house!