It is laughed apon because of Marios mistake saying "You know what they say, all toasters toast toast."
Toast is what all toasters toast.
Mario: "Hahahaa, here's the problem...too many TOASTERS!"
Mario: *Holding up a bag of Bowsers sowerpuss bread* "You know what they say... all toasters, toast toast."
*Mario unplugs outlet and toast goes flying everywere*
Link: "Oh boy! I'm so hungry! I could eat -TOAST"
The king: "Enough, my TOASTER TOASTS TOAST in the morning. I wonder whats for -BREAKFAST!"