What to do when someone else is angry?

When someone is upset you also don't get upset at the same time. Let them have their time if someone is yelling and shouting. It is their time, give them their time. You be a spectator. Not one who is a participant in that show. Another time you lose your temper and you shout. You show your anger. So, the problem comes when everybody becomes an actor, there is no spectator. Take turns to get angry. Have fun. Humour is the antidote to anger. When you are centered, humour automatically will be there. 

Also when someone is losing their temper without a reason, know that their pitta is high and help to calm them down. Give them some ice cream, milk, something that cools down the pitta is necessary.

Should I never get angry?

Anger is not bad. If it stays only for a few seconds, it is okay. It should stay, only as long as the line that stays when you draw it on the water. Once in a while, if anger comes up, don’t start blaming yourself. One thing that can be very detrimental on the spiritual path is self-blame. Showing anger itself is not wrong, but being unaware of your anger only hurts you. Sometimes you can show anger purposefully. For example, a mother gets angry at her children and can act tough or shout at them if they put themselves in danger.

Anger can also help in taking up challenges which otherwise you may not do. It can be a great motivational spirit here. But without the bitterness. If there is bitterness that anger has caused within you, it's going to eat you up inside. Anger is like that fire which can give you warmth, and which can burn you too. Look at the consequences of getting angry. Are you happy with the decisions you have made or the words you have spoken in a state of anger? No, because you lose your total awareness. But if you are completely aware and are acting angry, that is fine.

 It will take some time for you to get to that level, where anger does not even touch you. It will keep coming in different shades and intensities. Till that time, keep doing your practices - Sudarshan Kriya, pranayama, and meditation will help.