They look innocent enough, these hollow, translucent urethane tubes. They hang from the ceiling into an exhibition space where they come to rest at foot level. As you draw near to them, however, they "come alive," recoiling (literally) to the ceiling as they "sniff" your breath. When you move away from them, they "exhale" like a gang of long, living lungs, and slowly return to their original positions. It may seem creepy, but its a graphic example of how architectural environments of the future will behave.