What would you do if a mountain lion showed up at your door? Watch as this house cat has a stand off with the bigger cat. The house cat does not seem the least bit fazed by the larger feline. I think the house cat is a little more calm than the homeowners. I feel fairly certain I wouldn’t be calm if I had a mountain lion at my door. I am pretty sure the mountain lion wanted to get in and check out the house cat a little more. Thankfully, the big cat left before causing a bigger disturbance and the house cat did not get to riled up!