A boy improvises bowling , using a basketball released toward aerosol cans set up as bowling pins .
There is almost no chance that a boy is improvising the sport of bowling because he wants to become a pro bowler .
There is almost no chance that a boy is improvising the sport of bowling because he wants to become a pro bowler .
Chances are about even that a boy is improvising the sport of bowling because he wants to become a pro bowler .
A boy is improvising the sport of bowling because he wants to become a pro bowler .