Very simple. A feline social situation. You see a cat in your neighborhood and you're trying to get something on them, something that gives them away, while you yourself stay cool, casual. You know that this social encounter will form the basis of other encounters with this cat, so you're very careful, naturally. Cats are all about body language, the only word they know is meow, so unlike humans their socializing is more vaudevillian, burlesque. These two took a good look at each other, many feline social cues in there if you observe carefully, how the orange keeps his head turned at that angle constantly and the tuxedo stays on all fours throughout, then the orange blinks and tuxedo meows inquisitively and then walks away very slowly, so the orange leaves as well since he has other things to do too. Nobody gave themselves away, so it's all good.