In this quote from James Patterson's book "Middle School: The Worst Years of My Life," the speaker expresses a strong distrust towards certain individuals. The comparison to not trusting them as far as one can throw a truckload of pianos emphasizes the depth of their skepticism and lack of confidence in these people.

The hyperbolic imagery highlights how unreliable or untrustworthy the speaker perceives these individuals to be. It suggests a significant level of disdain or caution when dealing with them, reflecting the common feelings of mistrust that can develop during challenging middle school years.