There is one man who is sitting on top of a school bus while another man walks down the aisle of the bus .
It is almost certain that a man is walking down the aisle of the bus to tell the driver someone is sitting on it .
Chances are about even that a man is walking down the aisle of the bus to tell the driver someone is sitting on it .
It is almost certain that a man is walking down the aisle of the bus to tell the driver someone is sitting on it .
A man is walking down the aisle of the bus to tell the driver someone is sitting on it .