Graffiti stencil by Mr. Brainwash on the wall of Gallery One in Yorkville off Scollard.

From the TIFF website:

Mr. Brainwash is the moniker of Los Angeles–based street/pop artist Thierry Guetta. He has spent the better part of the last decade attempting to make the ultimate street-art documentary. His spray-painted stencils and pop-art posters have appeared in cities around the world and, recently, in solo gallery shows in Los Angeles and New York. He was the subject of Banksy’s 2010 documentary, Exit Through the Gift Shop.

Link to Mr. Brainwash wikipedia page