Really? I've never heard of such a phenomena as wind patterns in basements that open and slam doors repeatedly in quick succession. Perhaps you can provide a link?
i have watched this happen in basement levels.
i will try and find some type of architectural description to post for you.
the basic process i thought i had outlined in my post above
repeating that hopefully with a description that makes sense to you.
air conditioning ducts move air around buildings
these air conditioning ducts are pipes where air moves through
when you get large open areas like a large open floor space venting through a small narrow point,
in this case a door
it increases the air pressure which allows the air movement to shift larger weights(physicists can explain this for you)
all it requires in that situation is for the air-conditioning duct in the changing room, to be venting directly outside almost UN-impeeded
or to another floor high above which produces thermal lifting which is force/energy
and the effect of the outside weather heating cooling & wind shifting in light wind conditions can billow from side to side.
this shifts large displacement over a short range on a building
sky scraper engineers can explain these thermal equations for you.
the door is closed but has no latch and is very light
the outside weather conditions are light shifting high pressure shifting from side to side
or
another part of the building can have positive air-conditioning power fans shifting air.
the effect is slight shifting of large volumes of air in a narrow passage
all the person has to do, is open the door wide, then stand in the door way and they will feel the wind shifting backward and forth.
you can also use smoke to show it happening or any light object placed in the doorway
such events are quite common in large and partial constructed buildings.
as to the shadow image
either it is something above the guards head spinning which is hanging from the light
or it is added as a fake
i suspect it may be a small shadow that was then artificially enlarged.
additionally
there is no need to add musical effects to such video footage.
it has been clearly turned into an entertainment piece.
additionally notice the light density and the obvious border line digital rendering
it has been placed at its bottom end to increase lost data imagery and shadow effects
the shadow figure should if real maintain its value of light contrast to the over all video quality
which it appears NOT to, suggesting it is added.
boundary lines of the shadow figure are too sharp
additionally RE the wind effect of slamming doors
i have experienced this on large buildings before & investigated it myself to locate the wind source & air conditioning.
sometimes a squeeze point of air can be sitting in another part of the floor which amplifys the pressure differential effect
like small bellows and large bellows being pushed.
a certain level of physics knowledge is required to understand the basic principals
i am not a de-bunker if that is what you are wondering.
