Teetering, I read an article a while back that I think was to do with the AAIB, and that said the Public's perception of what they heard or saw can actually be better than that of an "expert" witness, be it Pilot or Engineer. Simply because they have no preconception or knowledge of what is happening, so they tell it in their own words what they heard or saw, and that can be more accurate in certain incidents.
So sounds of backfiring it is... similar to the bird strike of the 757 airliner leaving Manchester that took several down one engine, film below. If you didn't know what a stall or surge was, how else would one describe it? one would use terms you understand.
ThomsonFly 757 bird strike & flames captured on video - YouTube
RIP Guys and my condolences to family and friends.