Buster and the rest of the Punchy Motorsports team need to ace some brand-new moves at racing school. But when Buster struggles during practice, he gets hot under the hood--and accelerates out of there. After he turns down a path in the woods, Buster discovers a racing team unlike any he's encountered. These large military vehicles know a thing or two about keeping cool under pressure, and their dirt track--complete with tire-sucking swamps and razor-sharp...