Gulliver wakes up the beach after about nine hour sleep. why is he amazed after he wakes up ?

When Gulliver awakens, he is lying on his back. He finds himself unable to sit up or move at all. His "Arms and Legs were strongly fastened on each side to the Ground; and [his] Hair, which was long and thick, tied down in the same manner." He feels something moving along his body almost up to his chin, at which point he sees that it is "a human Creature not six Inches high, with a Bow and Arrow in his Hands, and a Quiver at his Back." Gulliver will later learn that these creatures are called Lilliputians. Startled by this sight, Gulliver roars out and soon manages to free his left arm. The frightened Lilliputians fire dozens of tiny arrows into his hand, face, and body until he lies calmly. The Lilliputians then build a stage to Gulliver's side that is about a foot and a half tall, upon which a "Person of Quality" stands and makes a ten-minute speech to Gulliver in a language he cannot understand.