See First Photo From Set of The Avengers

As you may recall, Monday marked the first day of shooting for The Avengers -- provided Marvel Police didn't indefinitely detain director Joss Whedon -- and that means over the course of the next year, there will be plenty of set photos and leaks to keep your superhero-loving mind occupied. This is the first -- though it might be a tad more anticlimactic than you were hoping. Click ahead to see the four coolest empty chairs ever.