A distinct type of forearm strike which is physically distinguishable by striking in an outward direction - horizontally.

Comments:

This strike most commonly effected on a line, but could also travel on a circle, depending upon need.

This strike mainly uses a Hammering Method of Execution, but could use Snapping if desired. And theoretically, Roundhousing or Hooking.

The word back, in this case, mainly refers to the contact point of the forearm, but to a lesser degree the somewhat backward travel of the striking arm.