Use this with your child or teen to help them understand what was behind their anger, what triggered it. 
Then use it as a discussion to help them understand that it's normal to have fears, we are human and that we all have them but that talking about what they fear will help them to understand and manage their reactions to triggers like that. 
You can find eft tapping scripts and a whole chapter on managing anger in my latest book 'Empower your Kids'.