I'm a part-time background extra. One of the rules we have is that we're not allowed to initiate contact with the important people. If they come over to us, that's fine, but we can't go to them.
James Callis talked to me while I was on Battlestar Galactica. He wanted me to be part of the scene where he makes his "We will get food!" speech to the starving refugees because I had the right look. Unfortunately, I'm in only a few frames of the final cut.
On the set of Watchmen, while we extras were filing back to the holding tent, I caught Zack Snyder's attention and extended my hand. "May I shake your hand?" I asked. He did. "I loved 300," I told him. "Thanks, I'm glad you enjoyed it," he replied. My scene is Nite-Owl's 1977 flashback (where the Comedian suppresses the riot). It was filmed overnight in late November. The second night wrapped early because it started snowing.