Don't look behind, all you will see is those you have walked away from, and the path you have strayed from.
Don't look behind, lest you be reminded of why you came down this road.
Don't look behind, or you may start to question reality.
Don't look behind, or they may start to question your sanity.
Don't look behind, or you will wish you hadn't.
I know, for I looked behind, and this happened to me too.