He jumped into the pile of leaves we just finished raking .
It is impossible that a boy jumps into a pile of leaves when his parents are finished raking .
Chances are about even that a boy jumps into a pile of leaves when his parents are finished raking .
It is impossible that a boy jumps into a pile of leaves when his parents are finished raking .
A boy jumps into a pile of leaves when his parents are finished raking .