Yes, there is always a good option to calm a little if you get angry but you should keep in mind that, if you see someone being angry or sad you shouldn't begin wih that fraze ("cool down") because you might don't know their reason. For helping someone sad or stressed you should first ask them politely if you can heplp them. If they are cqlm and they answer you, give it a try and continue. If they reject you , you better leave them alone because sometimes you may piss them off
