Duplicating Items

There is a way to duplicate items in Minecraft 1.8. What you do is place a tnt block next to an empty chest, light it, and use the 1-9 keys to pass it back and forth between your hotbar and inside of the chest. If sucessful, you will get the item with a red 0 on the item. From there, you select a different item, open a dropper that has a timer pulsating it, select the item with a red 0 and put it inside. It will then start dropping out the duplicated items, bringing the original item's counter down by 1 every time it's duped. A video showing this is found here. https://www.youtube.com/watch?v=NwXdqRP7q0M