Entrepreneur Jack Dorsey (of Square and Twitter fame) has posted several short videos of himself climbing the Bay Bridge. According to the San Francisco Business Times, the stunt was staged to promote Twitter's new "Vine" app, which allows users to upload videos of 6 seconds or less. Click here to see all the videos of Dorsey's Bay Bridge climb, who also has a thing for the Golden Gate Bridge. [San Francisco Business Times/Curbed SF/Now This News]
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