My mother informed me that a week ago he was staring out the sliding glass doors at the back deck one evening. So she opened the door so he could go outside, but being the big baby that he is, he wouldn't step outside. Which as it turns out was probably a good thing because there were two raccoons out there.
When I was home last weekend, he spent an inordinate time at his surveillance post by the front door. And no, there was nothing I could discern outside. I guess it's better than I when I used to come home from work and find him staring up at the wall.