How do you make the world's longest glass bridge, suspended 180 meters above a valley, even scarier? How about by dropping a stainless steel mug on it, causing the first of three layers of glass to crack? That's what happened on Monday afternoon, prompting tourists to shove each other as they ran to safety.

The bridge is now closed until further notice. Sounds like a fun bridge.

[UPDATE: It was actually a glass walkway leading to the bridge, not the bridge itself, that cracked. Curbed regrets the error.]

· Glass walkway suspended 3,540 feet above ground cracks under tourists' feet [Mashable, via Inhabitat]