the thing they all have in common is using the wrong kind of leash.. And /or a choker collar.
Lsstly, none of them quite seem to realize that dogs see things and will react to them.. I have no clue what thse people were doing other than showing that they do not really know how to handle their pet or the type of collar and leash to use.
My boy is 75 pounds and all muscle. He knows better than to try to pull me or miz micro as he is likely gonna get strangled...
Those pet owners are idiots...