A gunting can be seen as attacking a limb as a counter to an attack. A example would be to block a hook with one hand whilst driving an elbow into the attackers bicep with the other arm. As with a lot of FMAs, I believe the idea of that comes from the knife, and destroying the limb.
Kun Khao, from looking at that Muay Thai book you posted the URLs to, I believe there is one technique in there that resembles a "gunting". I can't remember what page it was on though.
__________________ Steven |