The limit of the Willing Suspension of Disbelief for a given element is directly proportional to the element's awesomeness.
Stated another way, all but the most pedantic of viewers will forgive liberties with reality as long as the result is wicked sweet or awesome. This applies to the audience in general; there will naturally be a different threshold for each individual.
The Rule of Cool is another principle that seeks to dispel arguments among fans over implausibility in fiction. It has been cited by animation director Steve Loter (of Kim Possible, Clerks the Animated Series, Tarzan, and American Dragon: Jake Long) in response to questions from fans attempting to justify temporary breaches in logical consistency. It is a complement to Bellisario's Maxim and the MST3K Mantra.