YAKIMA, Wash. -- Jim Hebert, a longtime insurance agent in Wenatchee who grew up in Yakima, waited three or four years before he told anyone about his bigfoot sighting while on vacation in Yellowstone National Park in 1994.

Wednesday, though, the 59-year-old Hebert shared his tale on the History Channel show “MonsterQuest.”

The program, which has featured episodes on the chupacabra, Loch Ness monster and giant squids, aims to “examine all the evidence available, from pictures and video to hair and bones, as well as the eyewitness accounts themselves,” according to the show’s Web site.

Hebert said while he was driving through Yellowstone, he looked over into a clearing below a wooded hillside and saw a “black hairy thing about 8 feet tall,” he recalled during a phone call Wednesday evening.

Earlier this year, a crew from “MonsterQuest” flew to Wenatchee and had Hebert reenact his experience in a similar-looking area up Chumstick Canyon in Leavenworth.

“There’s no question I saw it,” he said about what happened 15 years ago, emphasizing the image was blazed into his brain.

“Nobody can shake me,” said Hebert.