"Lower him into the convenient plot device!"
By the way, hardcore Star Wars fans know that the iconic "I know" line also almost didn't happen. According to the final script, Han was supposed to reply with a far less original "I love you too." Ford himself came up with the classic line on the set, not Lucas.
It's fascinating to think that if Ford didn't return, Han Solo would have stayed frozen or died off-screen in Return Of The Jedi, with Lando likely stepping into the sassy space pilot role. This is yet another example of how Star Wars wasn't planned from the beginning, no matter what Lucas keeps saying.