Cat Humor: Meowr!
Can it lead to forum-related situation? 
Somewhere out on cyberspace there's a thread connecting this strip and
"humor, autism". Moondancer's been a poster child for those on the spectrum since her inception in the parent show, and we see a glimmer--no pun intended--of it here. (I'm looking at you,
FOXTROT.)
...That said, in the hands of another comic strip team, the joke would have probably ended with the person in the sweater getting a face full of claw-marks from the cat.

Maybe Twi doesn't appreciate her delightfully puckish effort, but I'd bet Pinkie would.