How to Lower your gun in Halo: Reach on the Xbox 360 to make machinima

If you all remembered back in the Halo 3 days, trying to lower your gun while filming machinima was a major pain because the button combination that you needed to required you to be some kind of circuis freak! But not anymore, with Halo: Reach, Bungie has realized that everyone wants to make machinima and have released a much easier to do button combination with Halo: Reach that will allow you to lower your gun. Unfortunately, you have to be offline in order to do it, all multiplayer and online games don't support the function.