Most times there is not threat to you, however your alert level should be high if dealing directly with a situation. 

ALGEE: (mental health guidelines)

  A = Assess
  L = Listen (non-Judgmental)
  G = Give – reassurance and information
  E = Encourage the person to get appropriate and professional help
  E = Encourage other supports

If you are not educated to offer advise or help then don’t, this can escalate situations – listen, create space and leave when it is safe to do so.

Source: Mental Health Canada