Kinniku buster is just a muscle buster.

http://www.youtube.com/watch?v=hlJRaSG350s

Also known as the Mexican Stretch Buster.

A variant known is the Muscle Buster from Samoa Joe (http://www.youtube.com/watch?v=kweAJeGzSO4)

Over-Underboob

1) Mexican Stretch Buster was never an actual name for the move outside of the Smackdown video games.

2) Here's a clip of the move done faithfully (though you can probably tell why it's done Samoa Joe's way more) - http://www.youtube.com/watch?v=uIllCVa6NjM