Yep, just last Sunday one of our neighbours rent bungalows 'ignited' - I was minding my s&ite some 20 meters away, heard a dampened woosh and thought like oi, someone effed up with either some frying oil, cooking gas or gasoline used as firestarter ...
Apparently faulty flat TV, couple years old I gather, bungalow rented out but nobody in over the long weekend, all closed and locked up & apparently left electrics plugged in ... anyway, we saw smoke immediately - actually I think it might have been slowly smoldering for a while, gathering smoke inside witch then at some point finally ignited kinda like a slow, dampened explosion - deflagration I believe the correct term to be.
Owner was at home, we happened to have 4 folks working on unrelated construction but nothing left to do but take hammers, smash windows back & front and go at it with extended garden hoses both sides from the outside, damned windows all grilled up but initially way too hot & smoky to even try to get anywhere inside anyway.
Will say not too much damage directly by flames but still pretty much all & anything inside effed up from stinky smoke, black sooth and like ankle-deep water in the crib ... luckily no one even slightly injured in our case ...