Played off Eddie Murphy like the pro that he is in Trading Places, vastly underrated movie.
p.s. Jamie Lee Curtis showing us her fun bags didn't hurt either.
I would have to say "Trading Places" as well.
The scene I always remember when someone mentions his name is in "1941" when he was knocked on the head so he was delirious. He had panty hose over his head with a couple oranges in there and he said "I'm a bug!"
Another thing I remember about Aykroyd wasn't in a movie. It was at Belushi's funeral where he rode a motorcycle. I thought that was a nice touch.