A Cirque du Soleil performance left a Beijing audience audibly shocked when a banned image of the iconic Tiananmen "tank man" protester was displayed on giant screens in front of 15,000 people. The politically-charged image -- of a sole, unarmed protester blocking a line of tanks during a 1989 government crackdown in Tiananmen Square -- was displayed for about four seconds as part of a montage of protest imagery during a performance of Michael Jackson's "They Don't Care About Us," according to a post on That's Beijing magazine's website.