Actually, the object does not have to resemble a weapon, nor does the police officer need to see the object being pointed in their direction to justify shooting their weapon at the suspect. If a police officer gives a command, it is important the individual follows the command. If the command is not being followed, it is taken as a sign of aggression.
If you have a problem with the way you are being treated, it is a wise move to fight it in the courts, not in the street while having a gun being pointed in your direction, with the police officer's finger on the trigger.