Was the 75-year-old going for the gun on the policeman?
See also: Video shows police in Buffalo, New York, in riot gear shoving a white-haired man to the ground [LINK].
The vid shows the chap going up to the police.
The chap seems to look and reach out towards the gun on one of the police.
His hand seems to be holding a mobile phone.
It seems rather odd to reach towards the gun on the police.
He is then pushed away.
The 75 then seems to loose his balance then fall (although some on twitter believe his fall was a fake act).
from looking at the vid, the police seem to be defending themselves.