Item Duplication -- Glitch Explanation/Tutorial [Fallout: New Vegas/Fallout 3]

You can duplicate an item spawned in a container (spawned dead bodies also work) by depositing a stack of 6 or more other items with weight, then withdrawing them by pressing LMB and A almost at the same time. The reason the item needs to have weight is because of the confirmation screen you need when withdrawing. If the item has no weight (such as ammo or meds) you will not get a confirmation screen. This glitch works exactly the same in Fallout 3 as it does in New Vegas, and should also work on consoles (Only tried it with a controller)