Now THAT'S a new one, he'll give her that. Jax can't help his snort of amusement at the endearing nickname, finding that-- shockingly? He doesn't mind it, if it's coming from him. Which is . . . admittedly weird to say. It seems the habit to give everyone they encounter a nickname is the same in every universe. Go figure.
Curious, he stares as she circles him, one ear twitching in her direction when he hears the little noises she makes. He still has no idea what 'test' she has in mind-- but he's willing to play along for now. Not like he has anything better to do.
The effortless way she hops up onto the block has him barking out a surprised laugh, and his grin widens when he catches on to what she's doing. Ordinarily he's wildly against letting any of the bunny mannerisms show, exasperated and annoyed by them in equal measure when they do manage to eek out. So, being able to indulge in them now, if only for a little bit?. . . well. Who is he to pass up an opportunity like this!
"Watch and learn, Fluffy." Jax quips, crouching and eyeing the distance to the block for a brief moment, before launching himself up towards it. There's a moment when he thinks he might not clear it, but he manages to stick his leg out far enough, and he lands in a crouch beside her on the top of it with an easy, confident smirk on stretching across his face. "Easy-peasy!"