Anti-G20 Protesters congregate outside Union Station. (Pras Rajagopalan/CBC)

By Prasanna Rajagopalan, CBC News

A group of around 30 protesters snaked their way through downtown Thursday morning and congregated outside Union Station. They were calling for more action by world leaders on dealing with climate change. Many were covered in fake oil to illustrate their outrage at the oil spill in the Gulf of Mexico.

As they held court outside Union Station just after noon, a solitary woman stepped out in front of the protesters and began dancing to Junkie XL's remix of Elvis Presley's "A Little Less Conversation." (Although you could barely hear the music - which streamed through a pair of small, tinny speakers - over the exclamations of other protesters.)

Several others joined in and performed a well-choreographed routine. And there you have it - possibly Toronto's first anti-G20 flash mob.