Breaking Bad - "I am the Danger" Scene S4 E6 1080p

The third-person singular present form of the verb 'knock,' meaning to strike a surface to attract attention. It also serves as the plural noun for the sounds made by such striking or for mechanical sounds in an engine.

To perceive sounds through the ears as a physical sense. It often happens automatically without active effort, unlike listening which requires focus.

A movable barrier used to open and close an entrance to a room, building, or vehicle. It is typically made of wood, glass, or metal and is attached to a frame by hinges.

The term 'walt' is a slang or informal abbreviation often used in military, gaming, or subcultural contexts to describe someone who pretends to be something they are not, such as a soldier or an expert. It implies a person who is 'waltzing' through life with a false persona to gain status or attention.