HotDog, there are procedures in place (in the QRH) to deplane and sill allow for an evacuation upgrade. Only the doors in use are disarmed - that still leaves all but one armed and guarded. Every time it's discussed the instructors are careful to point out that an upgrade can come from a precautionary...
Of course, as BlueEagle suggested, you might just blow up. What's the real possibility of this happening? How insulated is the CWT (and any fuel lines) from the cargo hold? Or is it purely academic...
Lancer