Looks to be landing gear sticking up in the air - if so, it’s not from a 154.
What 154s don’t have landing gear?
The scene looks similiar to pictures I remember seeing in the news. Looking for examples to compare.
Here is the video with the sound like gunshots (wheels visible starting at 0:09, yelling starts a 0:44, shot sounds start at 0:57)
http://www.youtube.com/watch?v=frgKTW3jm_Y&feature=player_embedded
Here is a video of the Polish plane crash (wheels visible at 0:12)
http://www.youtube.com/watch?v=_QE9EPZdw5s
The wheels are distinctive, and they match, so the first video is indeed the Polish plane crash. The yelling and the shot sounds seem to go together, but it could be warning shots fired at looters/trespassers.