Final answer:
A boat caught in the path of a tornado and flying towards Bill and Jo is likely being flung away from the tornado, due to the centrifugal forces and the powerful rotating winds within the tornado.
Step-by-step explanation:
When Bill and Jo are chasing their third tornado and a boat flies at them, the boat is likely flying away from the tornado. This can be understood by considering the physics of tornadoes. Tornadoes are powerful rotating columns of air that arise from severe thunderstorms and demonstrate significant rotational motion. They can lift objects, including boats, and project them outwards from the center of their spiral due to strong centrifugal forces and winds. Therefore, any object, such as a boat caught in a tornado’s path, could be hurled away as the tornado moves along its track.