Know any examples of an actor spoofing their famous character elsewhere?

I'm trying to think of times when an actor, who has a famous character, has played a spoof or homage of that character elsewhere. A good example of this would be in The Rock where Sean Connery played a british spy who may as well have been James Bond. A bad example would be in Casper when Dan Ackroyd showed up as Ray from Ghostbusters since that was the exact same character, not just a similar one.

I figure there have to be a ton of examples of this, but I'm having trouble thinking of any. Even if it was just a cameo that would count. Do you know any?