Sasuke stopped suddenly. The hairs raising on his back were telling him that he was both being watched and followed. He hadn't had this feeling in nearly two years or so, when he was still with Orochimaru. It'd so easily explain why he was feeling off and overly cautious, and mentally hit himself for not catching it sooner.

After standing there for only a moment, Sasuke turned and made his way away from his destination. If he could prevent his brother's unnecessary involvement in his condition, he'd jump on the chance of doing it.

As he walked, he activated his Sharingan just in case it was needed. If you intend to strike, Kamui, you had better do it soon.