I don't care what the situation your in is, be it bank robbery or jay-walking.
When you are confronted by Police who are in an excited frame of mind. Yes you can tell.
LAY THE HELL DOWN! On your stomach, arms streched forward beyond your head, palms down. Ignore all commands, say nothing. Go limp. If the officer wants your hands behind your back, let him put them there. If the officer wants you up in the sitting or standing position, let him put you there.
If the officer wants to beat you, you will not survive whether you resist or not. So make sure he does not survive either.