On top of someone meaning

He came to the top of the stairs with a lamp in his hand, and wanted to know what the rumpus was about.

The offspring of the ungodly shall not bring forth many branches, and make a noise as unclean roots upon the top of a rock.

The jagged top and spurs of San Jacinto Mountain shone like the turrets and posterns of a citadel built of rubies.

The way was under a double row of tall trees, which met at the top and formed a green arch over our heads.

In fact, his appearance was so formidable that Davy did not pause for a second look, but started off at the top of his speed.

Then the roof itself, with its gables and dormer windows, softly folded itself flat down upon the top of the house, out of sight.