A suicidal Dubai man's final act earned him an unfortunate place in the record books. The man killed himself by jumping from the 147th floor of the emirate's 160-story Burj Khalifa tower, landing on a deck on the 108th floor. It was the first known suicide at the world's tallest skyscraper, the BBC reports. Police say the man, who worked in the landmark building, killed himself after his employer rejected a request for time off. (More Burj Dubai stories.)