If a person starts to get emotional and you are not experienced in dealing with this, just ask the Reiki guides to help you. Stay calm and the universe will look after you. Know that after the release the healee will have grown a lot. Another thing to realise as a Reiki healer is that it is not always possible to heal people, because the dis-ease that they suffer from might be part of their soul's purpose in this life. If this is the case and death takes place, know that death is also a healing process.
Modern societies try to deny the fact that death happens everywhere.
They think that if they deny it, it won't happen. Death happens everywhere, everyday. You must realise that it is merely a transition. In this age, death can be avoided by the ascension process. This is a process of becoming light, and being able to stay awake and conscious through dimensional change.