You may think you know what to expect from Blizzard's recently announce expansion World of Warcraft: Cataclysm, but until you read G4tv.com's Brian Leahy's first impressions of the game from the show floor at BlizzCon 2009, then you don't really know what you think you know. In this preview, Brian takes a look at two of the game's new races: the Horde’s Goblins and the Alliance’s Worgens, and what he found may surprise you.

"The racial abilities of the Goblins are also humorous, but useful. The first allows the player to launch themselves forward with a jetpack, jumping a long distance. I’m curious as to what areas in the current game will now be reachable with this racial ability. The second uses rockets to throw an instant direct-damage spell at a targeted enemy. The most useful racial for the end game might be the Goblin’s ability to call in a 'Pack Hobgoblin' giving the player access to his or her bank for one minute. If only there was one for Auction House access…"

What? You didn't think I'd give away the best bit in this post, did you? For the really good stuff, you'll have to check out Brian's full preview.