Idle Minds

We see Caine being his normal chaotic self here, having fun and thinking they're just hanging out. Then Jax asks about his secret hobbies. (key word there because that's exactly what he programed Able to tell Jax to ask him about)

Now this is where I paused, because that chaotic energy from before is completely gone and Caine almost seems stunned here. He freezes and his irises immediately shrink. Almost like that question was completely unexpected.

Then here for a moment he looks kind of disappointed or even hurt. Like the reality of the situation finally hit.

What if Caine was so excited about a human asking to spend time with him he truly forgot about the adventure for a moment. If this whole time Caine thought Jax genuinely wanted to hang out with him, but when Jax asked about his hobbies that's when he realized it was all for the adventure. Jax was never actually interested in hanging out with him, and I think that genuinely hurt him.

But he put so much effort into this adventure he can't let himself slip up now and reveal that he knows what's going on. In this moment he seems to think exactly that, staring Jax down with what looks like a dismayed expression, and has to quickly compose himself so he can play his part in the whole adventure.

TLDR; What if Caine was so excited about Jax asking to hang out, he completely forgot it was part of the adventure. Until Jax asked about his hobbies, and then he was left disappointed and hurt. :)

Aaand that's my thoughts on this scene after analyzing Caine's reaction frame by frame (ദ്ദി˙ᗜ˙) . Maybe I'm reading into it too much (Caine's my favorite so totally possible) BUT I'd love to hear y'all's thoughts on it!