For fans of J.R..R. Tolkien's novel, The Hobbit, this scene represented one of the most standout chapters of the book; for fans of Peter Jackson's Lord of the Rings trilogy, it was a re-introduction to fan-favorite motion-capture character, Gollum.
Time has vastly improved technology; and apparently the skills of iconic (and undervalued) motion-capture actor Andy Serkis, as well. Gollum was back and looking better than ever, and Serkis managed to once again give the character a balance of charm and fright that most live-action actors would struggle to maintain.
Aided by the wit and timing of Hobbit star Martin Freeman as Bilbo Baggins, the game of riddles sequence in An Unexpected Journey is arguably the best character cameo of any prequel film ever made. Fans will be missing ol' Gollum during the rest of this Hobbit Trilogy.