I watched a more lengthy discussion of this scene. Dead bodies are sometimes set with a trigger for an explosive device, meant to kill those removing the bodies. However, it was pointed out that the potential radius for the destruction of said devices is much further than demonstrated by the soldiers' proximity to the body...meaning, this was all an act to further "prove" how barbaric the Russians were for potentially rigging dead bodies. Once they had "proved" there was no trigger, the soldiers moved on.