I'm guessing the point is that you're watching a drama about John Lennon and you're buying the illusion, and all of a sudden Wayne Campbell shows up and compleely pulls you out of it.
I don't know why I know this, but if you want early Mike Myers there's this: https://www.youtube.com/watch?v=V1j6jXJuDH0
(He's in the first couple minutes)
"Convincing acting for sure kid. The illusion that a package was being delivered to our favorite Beatle was so convincing you just want to stick around to see John and Yoko open it up! Lemme tell ya, this kid's got a bright future! What's his name?"
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