A middle-aged man was taking part in the 268-metre-high Skywalk around a platform outside the tower when he became agitated and removed his harness which attached him to the building, witnesses say.
He then allegedly jumped off the edge in front of a young girl and an elderly couple who were left 'frozen' in shock.
Police were called to a 'self-harm' incident at 2.40pm and began to retrieve the man's body from beneath the tower.
One witness named Chris, who was inside the fourth-floor observation deck at the time, described the chaos that ensued.
He said: 'I was inside when I heard a worker start running and yelling back at his co-workers to "call downstairs".
http://www.dailymail.co.uk/news/article-5476449/He-fell-face-Harrowing-account-Sky-Walk-death.html