WARNING: Blood and gore alert!
We first see a Syrian rebel, identified by the pro-Assad forces who released the video as a trained-by-Nato [Turkey] member of the Free Syrian Army, apparently trying to clean his RPG-7 launcher. When he fires the weapon, well…. .it does not work out well for him.
Some viewers think that the Syrian regime has managed to slip some doctored RPG rounds into rebel supplies, but I think the viewers who are right are the ones who said that this chap inadvertently failed to elevate his aim above the fence he was hiding behind.