Many thanks to torihanateiramen for sharing his selfie with Keanu on instagram. The photo first appeared on November 21, 2011. It was taken at the Tsimshatsui, Kowloon Ramen Torihana when Keanu was in Hong Kong scouting locations for Man of Tai Chi. Cropped photo is below along with cropped photos from two other fan photos that were taken there.
