agreed - never ever use a person who is part of the family which includes the dog as a decoy.
Silent hand signals are good as they demonstrate some control on part of the animal. In a real life conflict reflexes kick in when yelling , running , screaming , things being thrown around happen. The reflex is going to be intense focus on "the problem" . Neither you nor the dog are going to operate in hand signal , watch for the hand signal mode.
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