Look for even a hint of rust on the springs under the seat cushion.

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With his little homemade seat cushion and gray hat on its hook screwed into the 402s tray.

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But what if you could get the same horsepower and 10mpg more from an engine that weighs half as much and could fit under a rear seat cushion?

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Another option from WeCU is a "smart seat, " or cushion full of hidden biometric sensors that could provide a more detailed read on someone sitting in an airport waiting area, Givon says.

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It's a row of three seats that can be converted to a futon-like arrangement the armrests can be stowed and solid footrests can be pulled up to the level of the seat, to create a flat cushion that fills the row.

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The central aisle of an airliner, the back seat of a car (stale popcorn crammed into cushion cracks), a coal mine, a hospital waiting room, a long tunnel in which a hot breeze blew first in one direction and then the other.

NEWYORKER: Ziggurat