A motorcyclist stops at an empty crosswalk , while thirty or forty motorcycles and bicycles sit parked in the street beside him .
It is impossible that a rider stops at a crosswalk at the 4th of July parade .
It is impossible that a rider stops at a crosswalk at the 4th of July parade .
It is almost certain that a rider stops at a crosswalk at the 4th of July parade .
A rider stops at a crosswalk at the 4th of July parade .