In the distance, Jon saw a loose dismounted rider turn around the corner of a building only to have his face smashed in by the knobbed war club of the Kal.
The Kal enjoyed smashing the rider's face in. 
mnli hypothesis: The Kal enjoyed smashing the rider's face in.  premise: In the distance, Jon saw a loose dismounted rider turn around the corner of a building only to have his face smashed in by the knobbed war club of the Kal.