[ Morty's not making a habit of peeking into stranger's rooms or anything. Like, that's their business, leave them to it, mostly. But every once in a while he'll hear something or catch a glimpse of something and it'll catch his attention.

Basic human instinct.

Honestly, all bullshit aside, he just has enough issues with old dudes being assholes to not be able to stop himself from barging in. He's not really friends with this kid, but he takes offense.

Nothing he does can change the long-term in this loop, which he knows from his own experience. And that experience has left him wound-up and kinda ready to fight something at any given moment. It can't hurt to pop in and do a little slamming, right? ]

Wow. Hey, maybe you should be grateful he brought you anything at all, huh? [ The words are reasonable. The tone is not. ] I- I mean, you got three forks there, pal. That's gonna be way easier to shove up your ass and smuggle into hell. At this point that's, it's pretty much the only thing I can see you needing it for anyway.