Because It's There (Happy Days)

Fonzie realizes he never accomplished a goal he set for himself as a child, and begins to lose his edge. Only after a pep talk from Chachi does he regain his confidence and set out to attain his dangerous goal. He and Chachi celebrate at the top of the mountain. Meanwhile, Howard, Marion, and Chachi find a prized position of Fonzie's and unknowingly... misplace it.

It aired on September 27, 1983.