/script MovieFrame:Show(); and /script CinematicFrame:Show(); will lock up the client it seems. You can press escape to get out of the MovieFrame. In addition /script MovieFrame:Show(); /script MovieFrame:StartMovie(1); will play a movie. /script MovieFrame:Show(); /script MovieFrameSubtitleString:SetText("Some Text"); /script MovieFrameSubtitleString:Show(); will display subtitle text. I was trying to get the MovieFrame thing to work with the exploit involving clicking the statue in Dalaran and spamming a /reload macro to make yourself unattackable that was released a while back, but was unsuccessful. Could probably convince people in trade to type /script CinematicFrame:Show(Random Cataclysm Thing Here) to annoy people.