On waking from a late morning nap, I saw a dark sphere the size of a smallish volleyball motionless in the hallway of my home about three feet off the ground and about two feet from the nearest wall, it was a dark metallic ball for three quarters of it with some kind of band of extrusions in a line and the top right quadrant from my line of sight was lighter colored or had a lighter colored overlay in a tonal lighter grayish hue. There was no sound, no motion. On sighting the object I thought to myself - oh that's okay then - and rolled over calmly. As soon as I turned away I thought - oh no that is NOT okay - and whipped back around to look at it again and the metal ball was gone.