One day, in the American Southwest

A man was traveling through the American Southwest on vacation. He'd been driving for several hours and was thinking that he needed to stop soon and take a break.

Right then, he saw a sign that said, 

Well, being curious, the man stops at the attraction to see the guy. He asks him, "What did you have for breakfast on December 13, 1998?" 

The Chief replies "Eggs!"

"Well, everyone has eggs for breakfast, this guy is a charlatan", the man thinks.

20 years later, the same man is on vacation again, and sees the sign for the Chief again. He thinks, "Aw, what the heck, I'll stop in and see him."

When the man approaches the Chief, he holds up his hand and says, "How!"

The Chief replies, "Scrambled."