Robert Downey Jr. Teases: Avengers Not Done Filming?

This just in from the Avengers press conference in Beverly Hills, where Robert Downey Jr. may or may not be messing with the assembled press a la Tony Stark: "We are shooting one more scene [for The Avengers]... tonight. Not kidding." Aaand with that mysterious cliffhanger, Downey and his fellow superheroes exited the stage. What does it mean? UPDATE: Joss Whedon reacts: "He's Robert, of course he's kidding." Well, it was fun while it lasted. And Downey did promise that nothing after his first answer would be sincere. Stay tuned for Movieline's full report from the Avengers junket!