Harrison Ford was frozen in The Empire Strikes Back because, unlike Carrie Fisher and Mark Hamill, Ford had only signed on for two films. After the success of Raiders of the Lost Ark, Lucas didn’t think Ford would return for the 3rd Star Wars film, but left him frozen just in case.
On several occasions, Harrison Ford has personally provided emergency helicopter services at the behest of local authorities, in one instance rescuing a hiker overcome by dehydration in Jackson, Wyoming
Harrison Ford had given up on acting to become a carpenter. George Lucas discovered him for the role of Han Solo while Ford was installing his cabinets.