There is a cheerfully rising tide of goofiness in Andrew Bergman's "Honeymoon in Vegas" that is typical of his work. This is the writer-director of "The Freshman," in which the members of a gourmet diners' club proposed to eat a threatened species of lizard, and so perhaps we should not be surprised this time when the hero finds himself unexpectedly part of a team of skydiving Elvis impersonators. What is surprising is how, by that point in the film, it seems more or less logical.