A suited man started dancing wildly in the middle of Church Street Mall this morning, surprising passers-by.
It sounds like something from a television commercial - and it is.
This morning the Nine Network is filming a commercial in the Parramatta central business district, which features actors, dressed as business men and women, students and bike riders, spontaneously bursting into dance as they walk through the mall.
Rumour has it the advertisement is a promotion for the latest Big Brother series, with host Sonia Kruger expected to appear around noon.
The grassy area in the mall outside St John' s Cathedral has been blocked off to pedestrians for the filming.