Fear or common sense ?

It was 11:30 in the night. I decided to take a stroll and flex a bit.

As I was walking down a lane near home, which happened to have a deserted lake at the other end, (the approach closer to the lake gets deserted) I noticed a car parked towards the end of the lane, with the tail lights on. It was dark and I guess the car had tinted glasses, whatever, I couldn't make out people inside the car.

Maybe, it was just harmless lovers, or just somebody who'd pulled over to take a leak. I dismissed the thought and continued to walk. I got closer and closer and still the car remained 'as is', tail lights on, no movement, all quiet. I began to think, what if it was a bunch of bad guys, who'd get out and mug me or something.

That thought just kept growing and I was reminded of how my friend got mugged in a lonely road a few years back and all the blah, basically none of my thoughts were helping me walk ahead and cross that car and trot off.

I stopped for a moment weighing the situation and decided to turn around and walk in the other direction, leaving the mystery car behind me.

As I walked away, I was trying to figure out if what I did was out of fear or plain common sense ?