Adrin cocked his head, moved his elbow, and slid his off-hand stick across San'doro's exposed belly.
Adrin and San'doro had a realistic fight scene in the movie. 
mnli hypothesis: Adrin and San'doro had a realistic fight scene in the movie.  premise: Adrin cocked his head, moved his elbow, and slid his off-hand stick across San'doro's exposed belly.