I'm waiting for the day to we one of these in the cage: The Brachial Chop, which can be done with an open palm or a karate chop.
Here is detailed instruction on the technique:
View: https://www.youtube.com/watch?v=G3Efb0jvbjA&nohtml5=False
Here's a couple of Marines doing it:
View: https://www.youtube.com/watch?v=DcaOr1TBA1w
And before you guys write this off, keep in mind that boxer Ricardo Mayorga did this to Din Thomas at the Shine press conference:
View: https://youtu.be/GrxsJIn_q30?t=224
(Edited because of a better angle.)
Din was momentarily 'tarded from that shot to the brachial plexus. If that dude wasn't there to hold Din up, he would've probably hit the ground.
It is not a power shot, it's more about accuracy and timing. Lots of MMA guys carry their hands low, & an accurate striker like a prime Anderson or Wonderboy could potentially pull it off on the grappler with low hands.
I would think a standing palm strike or hammerfist to the collarbone/clavicle would be effective. Supposedly, it only takes 7-10 lbs. to break a clavicle.
There was a time when spinning shit & karate front snap kicks weren't used, & now they're used all the time. The sport's young, it's only a matter of time till some karate dude busts out something like The Brachial Chop or a hammerfist to the collarbone.
Analyst Lawrence Kenshin made an excellent video showing Okinawan karate applied in MMA:
View: https://www.youtube.com/watch?v=juyanT_0zoM&nohtml5=False