a motocross bike kicks up dirt as it is being ridden around a bend in the circuit .
A bike drives over smooth asphalt on the parkway .
a motocross bike kicks up dirt as it is being ridden around a bend in the circuit.
A bike drives over smooth asphalt on the parkway.
If the bike kicks up dirt in a race, it is not on smooth asphalt on the parkway.
If the bike kicks up dirt in a race , it is not on smooth asphalt on the parkway .