Air Raid is a custom Mod and Kart set available in the US for free via a redeemable code issued from gamestop but also availalbe as part of the Uncharted inspired theme set. Features the rather splendid chap and his amazing flying machine (does not fly, obviously) to early adopters of the game.
Air Raid and his Kart
Air Raid can also be gained from an email from Sony, if you had previously joined Modnation.com before the game's release. Through some glitch, almost all of the emails sent had a basic XXXX-XXXX-XXXX code that didn't work. Sony has realised the problem, and a resend of the email WITH a working code arrived 2 days later.