A man walked into a store and said "Hi I'm Ed Asner" and promptly walked out.
Is it funny now?
Nope!
And cos you've left it so long since the last time, I've actually forgotten who he is again.
Awesome. 
Are you sure, zooo? I'm sure I heard some one laugh. And you're the only one here... 'cept for me.
Maybe I threw my voice.
Maybe he tries to exit by the broom cupboard. That's always funny.
The Fast Show, on paper at least, is a disaster. It's success is down to the quality of its performers.