A firefighter on his ladder up against a telephone pole investigating a problem , with smoky clouds in the background .
It is highly likely that there is a firefighter on his ladder investigating the potential cause of a fire .
It is highly likely that there is a firefighter on his ladder investigating the potential cause of a fire .
There is almost no chance that there is a firefighter on his ladder investigating the potential cause of a fire .
There is a firefighter on his ladder investigating the potential cause of a fire .