Man leaves no chance to make tall claims. In the novel, people make tall claims about the trout, but the final revelation was shocking. Elucidate.

All of the men in town tell a tall tale about how they've caught the SAME trout. The final revelation was very shocking, as George, wanting to get a better look at the prize knocked it off the wall....... imagine the shock when the men found the prize trout to be nothing more than a plaster cast!

That trout was plaster-of-Paris.