In which 1977 film does John Travolta strike a pose on the dance floor, pointing his finger to the sky?

In which 1977 film do people become obsessed with the shape of a Wyoming landmark and travel there to meet visitors? In which 1977 film does Christopher Walken play Duane, the heroine's odd brother? In which 1977 film does a hologram plead "Help me, Obi-Wan Kenobi. You're my only hope"? In which 1977 film does C-3PO advise "I suggest a new strategy, R2: let the Wookiee win"? Who released the Grammy-winning comedy album "Let's Get Small" in 1977? In 1977 Richard Nixon told David Frost, "When the president does it, that means that it is not..." what? Richard Dreyfuss won the Best Actor Oscar for which 1977 film co-starring Marsha Mason? In which 1977 film does Princess Leia tell her rescuer "You came in that thing? You're braver than I thought"?