It looks like
this explosion from Meet the Soldier is significantly larger than it would seem.
If we look at the file of Meet the Soldier in SFM, at the side, it looks like this:
It's only shown as two explosions in SFM because of the perspective of the camera, and the viewer wouldn't be able to tell it was two since there was a cut in the video. But in Meet the Soldier, it is treated as one explosion, as it is the same explosion that soldier emerges from. (Where would the 2nd explosion have even come from anyways)