Fear of the Dark?

I am riding motor-bike through an empty dark road at middle of night. The only part of the road i can see is the area that the head lights of my bike can cover. And when i look in the rear-view mirror i can see only darkness.

I turn back and give a look to my friend, who is accompanying me as pillion rider. There is complete silence, but sometimes we can hear some strange voices. That may be the reason both of us are not talking to each other at all, contemplating what these strange voices are and from where are they coming.

After a while, we see something lying on the road in a jute bag. And then the silence is broken. My friend asks, "Is that dead body?". Even i doubt the same but i replied, "No, that was just a bag, forget about it.", and i turn the accelerator as far as i can.

Again, i look in the rear-view mirror, and i see nothing but darkness. Suddenly, i notice the text on the mirror saying - "Objects in the mirror are closer than they appear.". I feel fear running through my spine, and i ask my friend, "can you relate this text written on the mirror, with what you see in it?". I get no reply back. I look back to get an answer, but i see there is no one riding with me, and i realised yes how can it be because i started the jiurney alone. But why did i see my friend in mind, riding with me? Is it just "Fear of the Dark" or was it really an object that came too near to me?