"I would jump off a cliff before I'd ever miss church."
The phrase "jump off a cliff" is not literal, but rather an exaggeration intended to emphasize how strongly the speaker feels about going to church.
An example of comedic hyperbole follows:
"My mother-in-law is so fat she has her own zip code."
Advertising makes frequent use of hyperbole in order to draw attention to the positive aspects of a product and garner interest from consumers. A new toothpaste, automobile, or electronic gadget must be the healthiest, fastest, or coolest thing in town.
Many consumers have grown accustomed to the use of hyperbole in advertisements and are no longer impressed by products being hailed by their makers as the "best" or "greatest" thing ever.