Recently, our cat Fred (that's Princess Winnifred in long form) wanders over to the neighbor's place and activates their motion detector. This turns on a light and she sits there looking for moths to come into the light so she can eat them. It looks something like this:
From this picture, it very much looks like a cat stalker staring into our windows. She sits in one place until the light goes out, and then when she decides to come home, re-activates the motion detector and decides to stay. This goes on for quite a while or until the neighbor drives a car into the driveway and in that case, she bolts for home.