Roadkill

Roadkill is a nickname for a canceled level in Call of Duty: Modern Warfare 2. The existence of the level is proven by a picture of a person on a motorcycle inside the artbook of Modern Warfare 2.

Trivia

 * In the game's source files, the level file for a mission called "roadkill" can be found. This is simply the level file for Team Player, and is completely unrelated to the cancelled motorcycle level.
 * In the album/soundtrack, there are several songs beginning with "Roadkill", hinting music had been prepared for the level
 * Call of Duty: Black Ops features a level called Vorkuta where you break out of a labor prison; this mission ends with a motorcycle chase.