He whips around as soon as he feels a tug on his tail and- chasing! He likes chasing!

He's after the cat like a bat out of hell, skidding to a clumsy stop at the base of the tree. After rearing back and placing his front paws on it, he decided trees are bullshit. But maybe he can climb it too... the cat made it look pretty easy. Ghoul pushes away from the tree and backs off a few paces. Far enough to get a good jogging start so he can also try running up it.

It goes about as well as expected.