TU204 didn't turn over, that was lucky. Though they left behind them a whole path of trees fallen and cut. And didn't blow up, no fire. And din't fall into small pieces, like TU154M here, but as they say eh? collapsed along the sewing lines? where they forged it together, the metal, when making it. Into big pieces cracked, along the production "lines".
Now the TU154M (the forum disputes) must have landed on roof, which is bad, because floors are strengthened, for the case of "landing on the belly", and roofs aren't, these TU-s are not supposed to fly upside down, they are not avia show destroyers.
TU154 can make a "barrel" in the air, turn over and fly further on, but this was just done once, by a naughty graduate, his name is famous, as his study in the piloting academy ended for him on that trick, no qualification, 5 years of study lost.