autocolliding muscle... dont you hate when you flex the arm/leg of a character to the point that the skin overlaps itself?

i saw a tut about it for xsi but now i cant find it, if anyone know where it is, or even better, how to fake it on maya...

the goal is for example to setup it in a way you have a normal relaxed bind pose and then you flex its leg until this pic...

maybe this thread is more of dynamics/cloth, but since i want it for character rig and setup...