Forrest Gump began the narration of his story by looking at the shoes of the young nurse sitting at the bus stop next to him and stating,
"Those look like comfortable shoes. Momma always said you can tell alot about a person from their shoes. Where they're going. Where they've been. I've worn lots of shoes."

And so began the first of several flashbacks, with the young Forrest taking his first few steps after being fitted for the leg braces he'd wear until he literally ran out of them.