This plastic question mark is a question it self. You have to make it stand on its tip on your finger. It sounds just impossi- ble. Try it it doesn't work. Now take a leather belt which we often wear. Insert it in the slot on the question mark and try again. Wow ! It just stands on finger!! The belt certainly adds weight to the plastic piece. This add- tion however changes center of gravity of the body and it is now below the point of suspension. Due to their attained and the plastic question rang son your finger tip.