I was not sure if it was within the movie or a real announcement. Eventually all 13 something cinemas were evacuated because of one stupid bozo who decided to light a cigarette in one of the Cinemas. We continued with the movie missing only a few minutes.
My Harry Potter story does not end there, as I went to see it again at IMAX. The last 20 minutes was in 3D, and just before it switched over to 3D the screen went black with the audio still running. The movie stopped for 15 minutes, and then the visual came on without the audio. Thankfully the film continued so we could all view the ending in 3D. I think my Harry Potter and the Order of the