A tree processing vehicle comprising a prime mover and a pair of tracks for propelling the tree processing vehicle, the prime mover being in a driving relationship with the tracks. The wheel events or features may comprise main games or bonus games, or may comprise entertaining representations of outcomes of other games or events. The semiconductor device includes at least two doped regions, such as two n-typed regions implanted in a p-typed semiconductor layer or two p-typed regions implanted in an n-typed semiconductor layer.