A distinct type of palm-heel strike which is physically distinguishable by striking in a forward direction - with fingers pointing upward.

Comments:

This strike is most typically effected on a relatively horizontal line (palm-heel portion), which then (optionally) switches to a vertical line (the claw portion), after contact is made; but may be executed on an upward or downward slope, or a slightly arching path of travel. depending upon need.

By definition, this strike either uses a Thrusting (or Snapping) Method of Execution - followed (optionally) by a Clawing Method of Execution after contact.

The word straight, in this case, means to follow a Line of Travel that is relatively parallel to the vertical (width) center-line (and relatively perpendicular to the vertical (depth) center-line).

It can be said that this is the linear version of the overhead palm-heel strike.