Stumbled upon this little doozy.. not scary or sickening, but a little unsettling to be sure. Clear a couple minutes.
http://www.creepypastaindex.com/creepypasta/the-strangers (http://www.creepypastaindex.com/creepypasta/the-strangers)
A very creative tale and worth reading.
What, I wonder, would you think were you to have read that on a train.
As a note to other potential readers, there is some mature language in that story. Nothing over-the-top but there nonetheless.