Cloth simulation and Pins question

Hey CGcookie team! I have been trying to replicate the famous Indiana Jones scene where he is running away from the boulder, although I stumbled upon a problem. Basically what I want is when Indiana runs into the spider web, I want the pins (created by vertex group) to break. This would mean when Indiana runs into the web, It would fall to the ground instead of swinging on its two pins. How do I go about this? (note the web's animation is created by a cloth simulation).