Jacen Flynn, Pro MMA fighter, demonstrates a nasty Triangle escape where he uses his shin across his opponent's neck. I really like the 'pain compliance' aspect of this technique.
In the video he does the technique by reaching his right arm across his opponent's body to their right shoulder. Then he brings the right arm to his opponent's thigh. I would avoid extending the arm the way that he does because you are putting your arm in the line of fire for an armbar.
Instead of reaching across your opponent's body I would control their right wrist with both of your hands and bring it in tight to their hip. This way your opponent cannot finish the Triangle and you are in less danger from the armbar. Check out steps 2 & 3 Here.
Then you can continue to finish the tech the way that Jacen does with the shin across the throat. This is REALLY effective !
