I would be very nervous in that situation. Even if you tried to explain what you were doing "I don't have a gun, I'm going to remove my hand from my pocket slo

I would be very nervous in that situation. Even if you tried to explain what you were doing "I don't have a gun, I'm going to remove my hand from my pocket slowly" there's every chance they'll still be shouting instructions and not hear you. If they mistake a shadow or fold in fabric to be a dark shape, you're toast.