City Under Siege

Sci-fi actioner by Benny Chan. To be released in late 2010.

"In this film on courage, a group of circus performers goes on a rampage after some kind of mutation, that grants them superhuman abilities, in an accident. However, one of them, an ordinary clown originally, would not condone the others' misdeeds and for the sake of the entire city, stands up against them."

Press conference video (some BTS footage at around 2:20)
http://video.sina.com.cn/ent/m/c/2009-06-12/013044059.shtml