Unarmed Technique: Khan Trick
This perk will allow the player to scoop up a fistful of dirt and throw it at the enemy. It is obtained by completing the Aba Daba Honeymoon quest line for the Great Khans, located in Red Rock Canyon.
(On a personal note, this is a perk that I did not get the first playthrough, so it was a thrill to get it this time around. Now to use it!)