A Stretch Armstrong figure like the one you had when you were a kid. You hold the doll by one arm, and it stretches and while you hold it the rubber stretchy doll drops to the floor. At first you think that the new Stretch Armstrong is stretchier than the one you had. You start to reach to pick up the doll. but realize you never let go of it. The doll's arm didn't stretch all the way to floor when you picked it up, your arm did!
You let go and watch your hand spring back as your arm snaps back like a rubberband. This can't be real, can it? Have you really acquired the superhero powers of Elastic Lad, Plastic Man, and Mr. Fantastic?
A test is in order.