This is a technique that we were working on in December in our Advanced Class.
Simple, easy, and no fancy movements.  It may not always be a position that you get the first time setting up, but if you get used to looking for it you will find it when attacking an armbar from side control or mount. It is a counter to certain escapes.  So learn it, drill it, then when sparring look for it.
Good luck and See you on the mats!
 

Jiu-Jitsu Battle - 2012 Invitational
Saturday, December 29, 2012
Fitnex Training
Los Angeles, California, USA

The tournament is being organized by Want vs. Need. It will be an 8-Man tournament featuring 8 top Jiu-Jitsu Purple Belts competing in One Division (Light-Featherweight/Featherweight/Lightweight). The Rules are Simple: Submission Only with No Time Limit.

Here are the 8 confirmed Purple Belts:

-Jose Fernandez (Sandro Batata)
-Michael Liera (Atos)

Here is the story of a day spent training with Master Rickson Gracie

-See what it was like to enter his academy.

-See what it is like rolling with Rickson Gracie.

-Ken Primola worked his way through the gauntlet and found much more than he bargained for as he encountered Rickson in front of him.

-A MUST read for all grapplers.

-An inside look from an outsiders perspective.