Like an upside-down lava lamp, in time the sediment sinks under the salt.

FORBES: Magazine Article

Quentin Tarantino, whose name has been linked, rightly or wrongly, with a genius-level IQ, plays a blind street preacher who runs into lamp posts and falls down the steps of a subway entrance ...

CNN: Not-so-divine comedy

What's more, the sensors are apparently also able to detect the proximity of the object and adjust the resistance of the door accordingly -- for instance, slowing the door down if you're about to slam it into a lamp post.

ENGADGET: BMW devises smart car door that senses danger