The outer door could only be reached by a slender bridge of stone, without kerb or rail, that spanned the chasm with one curving spring of fifty feet.
Sam shuffled along, clutching hard, and looking down into the pale eddying water as if it was a chasm in the mountains.
So they passed into the dark chasm of the Gates.
Under their shadow Elessar, the Elfstone son of Arathorn of the House of Valandil Isildur’s son heir of Elendil, has nought to dread! ’ Then the light of his eyes faded, and he spoke to himself: ’Would that Gandalf were here! How my heart yearns for Minas Anor and the walls of my own city! But whither now shall I go? ’ The chasm was long and dark, and filled with the noise of wind and rushing water and echoing stone.
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You can’t leap a twenty-foot chasm with two 10-foot jumps.