Facebook Co-founder, Mark Zuckerberg and newly wed wife, Priscilla, made a special cameo appearance in the street of Shanghai in a documentary about China Police. They were just passerby and they look like they are enjoying it.
Not sure when this was taken (but according to source, it should be in March this year). Look hard at around 0:29 seconds for Mark Zuckerberg and Priscilla. I guess the people does not know who he is.