large holes or leave ruts that can easily upset smaller, lighter vehicles, and every vehicle responds in different ways to different track environments. Vehicles like big rigs and mudpluggers get excellent traction in mud, whereas lighter vehicles like dirt bikes and ATVs will slip and slide. Nitrous boost plays a large part in MotorStorm and is used to either catch up to opponents or pull away from them. Players must keep an eye on their boost meter, which shows how hot the car's engine is. The longer the boost is held, the hotter the engine becomes. If the boost is held when the engine reaches its critical temperature, it will explode. Since explosions resulting from the boost typically rocket the player's vehicle forward, they can be used to edge out another racer across the finish line. This can be very useful when behind, although this does not work all of the time if the AI opponent gains the upper hand. In online play, Catch-up mode can be enabled. This means the leader of a race has less boost than everyone else, allowing players further back in the field to "catch-up". If the leader changes, so does the racer with less boost. This makes using boost for the leader a technical task, in theory they should only use it when necessary, and relying on their individual driving skills to win them the race. Development E3 video footage Early details released by Sony and Evolution Studios show high-quality rendered video sequences. Many gaming enthusiasts and members of the press became sceptical as to the source of the material shown, with most people suspecting the footage to be pre-rendered as opposed to real-time in-game footage. In March 2006, shortly following the Game Developers Conference, leaked footage of a tech demo was spread across the Internet on sites such as YouTube. The demo showed a yellow buggy and a motorbike both cutting through mud, as well as splashing the mud onto a white truck, and showed violent crashes, such as a bike landing on a purple rally car, causing it to spin out, and a white mud plugger ramming through the yellow buggy, causing it to get crushed by rolling over and crossing through flames and crashing into the guardrail. Being a technical demo, it did not show any gameplay aspects or whether the final game would reach the standard of the E3 2005