Around 1:00 a.m., a homeowner stands at the base of his staircase while a freight train passes in the distance.

Out of the corner of his eye, he sees what appears to be a dark mist halfway up the stairs. When he looks directly at it, nothing is there. Moments later, he experiences a sudden chill and a clear internal sense that he should leave the area and go to bed.

No voice. No threat. No further incidents.

The experience lasts only seconds.