ORIGINAL: feddoc
Some safes have a series of re-lockers (designed to force the locking lugs into position) in them to prevent the rookie from taking your stuff via the drill or the torch.
With a torch, you can get into any safe. Relockers or no relockers.
The only thing that will discourage a thief is if the safe is armed with Tear Gas, which you can add to your safe if you wanted it!
My safe had a faulty latching mechanism. Took a safe company employee almost 4 hours to get it open...which made me feel really secure about some common thief.