It happened in "The Fall of the House of Usher" (by Edgar Allan Poe) that while Usher and the narrator speaks, Usher's sister walks through the room, apparently unaware of the narrator. The narrator's reaction to seeing Usher's sister when he sees her pass through the room was with an utter astonishment not unmingled with dread.
air pressure is the answer
I do not know his goals but I know several accomplishments. He painted the Mona Lisa, he created an alarm clock that yanked your feet up to wake you up, he invented bicycles, and he created a metal lion to please the king.
Drums because you can beat on anything almost and get a sound
