Witness

What will you do?
Your just minding your own business and then it happens.  You witness something you wishbyou didn't see.
It could be anything,  people having sex,  killing someone,  speaking something,  kidnapping,  anything. 
But you saw it and now you have to tell the authorities what you have seen and that means putting your own life in danger.
Even if you didn't witness a horrible thing but a minor thing like a guy or girl cheating on each other.  You as a friend will act on instinct and you will tell someone what you saw.
It's just something that everyone does.
We see things happen and we tell.
But still everyone of everything is a witness if we want to or not.