A couple of ideas for General Dodonna's briefing scene. Maybe the computer Dodonna is using has to boot up before he can begin his presentation, so everyone has to wait through an extended Windows booting up sequence superimposed onto the viewscreen.
And/or: Partway through the briefing, the presentation could crash, replaced with the dreaded "blue screen of death." But Dodonna, seemingly oblivious to the crash, continues narrating the entire presentation anyway.