In the passage from "The Calling" by Kelley Armstrong, the narrator experiences an unusual sensation when they turn around and notice their tail. Initially surprised, they begin to explore the origins of this new appendage, which leads to a realization about its functionality. Although they can't see the tail clearly, they discover that it moves easily in response to their thoughts.

This newfound ability seems convenient, highlighting a unique aspect of their transformation. The tail's size and responsiveness suggest that it will play a significant role in the narrator's journey, introducing an element of curiosity and anticipation regarding their evolving identity and the challenges that lie ahead.