The craft never made a sound

I first noticed blue lights.  I ran downstairs, and then to the kitchen door.  My mother was facing east, and across 510 central st.  As we both stood there, a craft over 80 ft. from end to end was hovering 20 ft. off the ground.  As I noticed the upper surface "flowing" across its surface like mercury being manipulated.  
The lower surface was awash in intense blue light with tendrils of lighter blue trailing down to the ground.  Slowly, the center of the upper section rose up until I could see wide horizontal windows.  Inside slightly reptilian creature looked at me.  The craft rose up to 80 ft. and slowly, but steadily moved over our house.  
At 1108, my father pulled up in our yard, walked up to my mother.  When he touched her, she jumped and screamed.  One thing is odd.  We could never remember what happened to 8 minutes in between.