If we are already walking with strangers mathak which we do not know what he is, and even in places that are not familiar, will cause fear and concern of our more.
If we are walking, then a stranger to say that I did not know he was there, and even in places that are not accustomed to making our fears and concerns are greater.
If we're walking already had a stranger to which we don't know what kind of person he is and the more is in unfamiliar to our fear and anxiety are more and more.