Shadow of the Carpet Zone

I revved my legs, ready to dash, but this dim hallway stretches into nowhere. Yellow walls, weird hums... wait, look! Crouched right by the baseboard was a hulking, fluffy black shape. Silent. Menacing. A zone monster! I charged straight in, planted one red shoe, and delivered a solid side-kick with my plastic knee locked. Wham! The beast didn't even bite back—it just flopped over into a limp pile against the wood. Wait... it's just a thick winter sock? Hey, a win is a win. Monster defeated! Now, where does this long corridor loop around?