Now that you say it, I can see it. at 0:12, Leo locks eyes with Rookie. Rookie’s challenging, so at 0:15 Leo shifts his paws over. That was a clear message that Rookie’s being rude and should look away, but he doesn’t, so Leo corrects him – not even too harshly. The funniest part is Leo’s old lady going: “leave him alone, he’s just a dumbass and he won’t understand.”
If I remember correctly, the trigger was the eye contact which was seen as a challenge.
Now that you say it, I can see it. at 0:12, Leo locks eyes with Rookie. Rookie’s challenging, so at 0:15 Leo shifts his paws over. That was a clear message that Rookie’s being rude and should look away, but he doesn’t, so Leo corrects him – not even too harshly. The funniest part is Leo’s old lady going: “leave him alone, he’s just a dumbass and he won’t understand.”