If you look closely over Casper’s paw, you can see that he actually has a ball (and a leaf) sticking out of his mouth. He might look like he’s just having a good time there all alone, but he’s actually–
Boomer plays it cool.
Casper: “I have a ball!! SEE?”
Boomer: “I don’t care.”
Casper: “You want my ball!
“Yes, you do. You want my ball. You want my ball!”
Boomer: “Okay, I WANT YOUR BALL.”
Casper: “But you can’t have it!”
“I’m the king of the world!”