TERRIFYING.

After a huge gust of wind, two window washers were caught swaying and repeatedly smashing into the second tallest high-rise in Shanghai, China on Thursday. The incident occurred on the 91st floor of the 101-story Shanghai World Financial Center.

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This is what the 1600-foot Shanghai building looks like from afar.

According to Travel China Guide, it houses offices, a hotel, museum, observation, parking garage and retail shops.

Via i5.photobucket.com

And the building boasts stunning views of Shanghai.

Via flickr.com

"I'm worried for them," an eyewitness said during the video.

Via youtube.com

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