Wrestling in Armor - A vid for you low-tech guys

[Gigermann]

Originally Posted by RobKamm

…The technique that I like to use actually builds out of a parry action. Parry with the blade while stepping in, roll the wrist and strike with the pommel to the temple. Done properly the parried attack powers the pommel strike. Easy to do, nasty to do. Followup with a throw (Judo, with Armed Grappling) and you've got a fight winner.

We can see this work IRL, but why would you do that in GURPS? Why would you not follow the parry with a blade attack, if there's no specific benefit to doing otherwise? In game-terms, how does that parry momentum have any effect on the pommel strike?