Wow, a door knob that lights up during emergencies. Designer Jeong-Sun Park has come up with a door knob that stores energy (thanks to an internal generator) to light up during emergencies. Well, emergencies as in – going to pee late night, bad/empty stomach etc. Lighting doesn’t get better than this. But hey, how does it work? I mean – if it is always on, for sure there is energy being wasted, or say, if it is manually operated, then what’s with the emergency clause? Good job, but, I’ve my doubts!