The feeling you get when you are craving an ice-cold beer. Your hand starts to tremble and forms the shape of a claw, suitable for picking up a can. The only way to overcome these trembles is to fill the empty space between your thumb and fingers with a cold one
Alex: Help! (hand starts shaking)
Justin: Oh god Alex has a severe case of can hand.
Doug: Quick get him a beer.
(Justin places beer in Alex's hand)
Alex: Thanks that was a close one.