I found a description as follows online:
Khatra describes the follow-through motion of the bow hand upon release of the arrow. The Khatra technique is typically performed in one of two ways. Pressing the bow downwards and forward upon release. Pressing and/or turning the bow outwards, away from the center of the body upon release.
Here I read an activity, 'pressing'.
Khatra torques the bow. Khatra is not good for a traditional bow with laminated components made to take tension and compression in the length of the bow. A horn bow is made from different components.
Using Khatra with any of our bows voids warranty.
We will not honor any warranty claim caused by Khatra. If you plan to be using or practicing, or learning this motion, technique or way of archery, please use any other bow.