Just Some Friendly Playtime, See?
Pets can be pretty sly and mischievous when they are not being watched. These cats took their play a notch higher, which probably led the owner to check upon them, and they looked at him as if nothing had happened like they were the good boys he wanted them to be.
To be fair, the felines were probably sorting out their hierarchy issues to decide who goes on which seat and who gets the first purr when their human gets back home. All in all, we hope they figured it out!