From the EDI incident..... Definitively.....
During push back a passenger, (perhaps the one quoted above), witnessed a hot-start/tailpipe fire. He panicked and ran to the front of the aircraft where his demeanour convinced the solitary junior crew member there that the aircraft was about to erupt into flames...... Upon his word the evacuation began.
Like you may be often told - It never goes like in the Sim. On the ground if someone outside the flight-deck initiates an evacuation then you have no choice but to go with it. The alternative is to have panicky passengers outside the aircraft getting sucked down engines.
Thank God there were no injuries. The question is.... Should this individual suffer censure?