The creepiest mysteries are the ones that happen in real life

We drove up to my friend’s grandmother’s house in the mountains of New Mexico for a skiing trip.
On one of the first nights we were all just hanging around the house and my friends went upstairs to play a drinking game; I stayed downstairs to watch tv in the living room.
It was probably 11pm and I was just about to doze off when I heard a BANG — the back door swung in and slammed into the wall.
I yelled “What the fuck?!” And my friends ran to the stairs asking what happened.
We turned on the outside lights and didn’t see anybody but…
There was a trail of heavy footprints that went from the trees to the big window – whoever was out there had been staring at me on the couch because there were no blinds or curtains – and then the trail went to the door, and then disappeared around the corner of the house.

Needless to say, I didn’t sleep that night.