Passenger Initiated Evacuation
@SB and others. Watching the available videos of the AC on fire, the red flashing beacon was on. To me this indicates engine(s) still running.
Not a good idea to deplane when #1 may still be running.
As for those fearing the alum. foil skin will burn through in seconds, think again. Is it not an Aluminium alloy, designed to be much stronger than pure aluminum.