it s funny, the president actually joked about it in a meeting with the deputy prime minister, nicholas clegg, today. and he kind of explained it, he seemed a little befuddled about what happened. take a listen to this exchange. i thought that it was like out of the movies. well, it s wonderful. thank you so much. thank you. reporter: so clearly he wasn t quite sure, the music kept going. obviously, the band thought they had a cue. somebody in the president s protocol staff clearly didn t brief him well enough or he didn t read his briefing papers on the protocol. i guess in his defense, the queen s done, i think now 100 of these state dinners. and the president s done one. you know reporter: kind of like the academy awards. here comes the orchestra.