The geometry of a Lunar Eclipse is special. You the observer, right in the middle of the line joining the Sun and the Moon. Sun went down steadily in the west, Naina Peak & The Observer cast a shadow on the mountain face below. Although it was below the horizon, and not visible yet, we knew that the location of Moon was coinciding with our shadow.
Hanle Dark Sky Reserve
Seven Wonders of the 'Hanle Dark Sky Reserve' Night Sky