Seen any of these yet? Door knob gives you a preview

Would be neat to see this in a fire situation, tactical police incident? Pretty cool item here. Could see some uses but not all doors should have it.

Probably not all doors should offer previews, all the time, but this is undeniably wonderful. As it is, the knob offers bi-directional viewing; I wonder if you could half-silver one side and make it one-way? From Make magazine

Johnny Strategy at Spoon & Tomago writes: In conjunction with Design Tide Tokyo, architect Hideyuki Nakayama - a protégé of Toyo Ito - has teamed up with UNION, a manufacturer of door handles and levers, to create a glass globe doorknob. As you approach the doorknob you catch a glimpse of what appears to be another world, waiting for you to enter and join, but in fact is a reflection of the room on the other side of the door.