Arjay,

I'm not an expert on Forensic Ballistics, but I am a recognized expert on firearms, however I've studied enough to know that the points that you raise are all explainable re the apparent lack of head movement and lack of blood.
As I explained earlier the apparent lack of recoil could be due to using lower powered rounds to lessen the chance of ricochets within the building, purely as a self protection measure.
Note that there doesn't appear to be a blank firing attachment on the rifle.
Then there is the apparent puff of cement dust from the footpath.

The exploding watermelon was not from an AK47 round; this is a deliberate lie to mislead the uninformed.

As I also said the 7.62 x 39 mm AK round is on the puny side of medium powered and the gun itself is a medium to short range 'spray and pray' weapon.
It is also interesting that the ConTheorists cannot come up with anything but this little bit of footage.

David G, "fortunes they amass and do not need" the King of the Saudi's comes to my mind who has just died, a multi billionaire, his fortune should have been used to better his poverty ridden country, death being final brings him right back with his poor countrymen, and his billions now mean nothing to him, he is now just a rotting carcase

Oh dear, recognise it for what it is !
It is a war, running under different rules to what has previously been seen.
These new rules are being used because the old way of massive armies
sweeping across countries is obsolete.
The new purpose is to frighten countries into giving in to the demands
of the Islamists in exchange for not being killed.
Doing so of course will result in creeping Sharia law and a theocratic
fascist government.
They said it loud enough, they do not want our freedoms !

Wake up and apply the rules of war !