Let’s look at a couple of good examples.
Example #1: Highlights of Mirko "Cro Cop" Filipovic, a former kickboxer, and currently an MMA fighter, known for his knockout prowess. Notice that the Thai kick applied to the temple or the side of the neck, when landed flush, almost always results in a knockdown. Ironically, Cro Cop himself was defeated in the UFC via the same technique.