The unmarked location Ghoul Outpost is an example of where this works very easily because the refrigerator and new cell are both directly behind the door. Sugar Bombs: This also works with Refrigerators and Sugar Bombs. Saving before entering the cell can allow one to the maximum number of Quantums (three) that can be acquired from a single vending machine. The game performs this dice roll when the cell containing the machine is loaded for the first time. Nuka-Cola vending machines have a 10% chance (dice roll) to contain a Nuka-Cola Quantum.
Item-Related Exploits Free Nuka-Cola Quantums Unavailable in the patched game and GOTY version. This can be done indefinitely for 20XP per door, with no chance of failure. There is a nearby terminal that allows you to lock the archives section (aka lock the gates) even if they were picked.
Several exploits don't work any longer since the Fallout 3 patch 1.1.