I was using a high power telescope, somewhere between 320-360 power, and was scanning down the terminator band on the Moon when it was just a sliver, maybe just a couple hours away from a new Moon.
At this magnification and with the light hitting the Moon at this extreme angle, terrain features stood out in vivid detail, shadows visibly moving by the second, but the field of view slid by completely within 30 seconds or so.
In a valley about ⅔ down the sliver of light I saw 6 or 7 massive disks hanging absolutely motionless in the air within the valley, casting individual shadows against the mountain walls behind them.
They had to be miles across to be seen at that distance, were brilliant reflective silver, totally featureless, and were arrayed near the walls at various heights from the valley floor.
I observed them for about 20 minutes until the shadow line advanced over the valley and the objects disappeared in the darkness.