2 finger position is used with large, whole chips
3 finger position is used for small broken crumbs (a committed chip muncher inevitably must convert to the 3 finger chip claw to consume an entire bag).
resembles the claw in the arcade machine where you try to grab stuffed animals and never win. (with the chip claw you always win)
more fingers may be used, meaning your too stoned to care
"Your chip claw is out."