The wrestling arena is often a place of grand spectacle, a World of Ham unto itself. Perhaps it's its own universe?
So what happens when you interject wrestling into a common, everyday place? That's right, Hilarity ensues.
Wrestlers don't even have to wrestle to be funny - wrestlers in full gear doing "normal" things, or wrestlers "trying to be normal".
-Lucha Libre movies (wrestlers are superheroes)
-WWE's "Raw 1000" ad (wrestlers at "work" in the WWE offices)
-HHH as "The Disciplinarian" on Drew C Arey
-Kane is the King of this trope. Grocery shopping, cooking dinner, anger managment classes....