Rumour running in TLS indicate a/c was taxiing away from area AFTER the tests, person fell in cockpit on the pedestal , All this in conditional.
Heard from the Fire brigade :
Electrics severed, so at least one engine continued to run for hours ( I heard 7h mentioned ) after the accident until ran out of fuel.
3 of the 10 injured are still in hospital, fractures and bruises but not life threatening .That at least is good news.