I was asked a fairly good question recently from one of my non-aviating friends, and it left me stumped for an answer.
He'd been watching the documentary about the testing and certification of the A380, and had noticed all of the test crew wore parachutes. His question was how they would all get out of the aircraft in the event that something went wrong?
I have to admit, it had me stumped. My guess would be that in the absence of a dedicated escape hatch, the crew would be reduced to leaving by one of the main doors (presumably rigged for the test flights so that they can be opened/jettisoned in flight), or through the fuselage in the event of a catastrophic failure.