Ernest T. Bass (Howard Morris) is different. Or as Barney says, "He's a nut!" He's 112 pounds of pure rock-throwing orneriness. He's also strong. "I can do twenty chinups with one hand ... and I can chuck a full-growed sick jackass over my shoulders and tote him five miles to the doctor."
On top of that, Ernest T. knows lots of important geography and arithmetic. He's got the diploma from his "mother figure" (Miss Crump) to prove it. In any case, you can be sure that "you ain't heard the last of Ernest T. Bass."