My kitchen window looks into an (out house) the out house is where i keep my bikes so it is securely locked. So at night i am cooking a meal and see my reflection in the window just as clear as in a mirror. I am wearing a stripey jumper which also shows clearly in the reflection, as i move about i notice another (assumed) reflection, only it is just a white shape that matches the out line of the first, the second reflection doe's move but doe's not match my movement exactly, and the first reflection can mask the second. I have tried to reproduce this effect tonight with no luck, when i told my daughter about it the first thing she said was ghosts, i do not believe in ghost so i would love to find a rational explanation. Any one? No i was quite sober.