Alice stands at a vending machine. Wally points to a beeper on his hip and says to Alice, "I got myself a little work-avoidance device." Wally continues, "If I want to leave a meeting early, I just look down and say 'uh-oh' and scurry away." Alice asks, "What's the pager number in case I need you?" Wally says, "You're not quite grasping the concept here, Alice."