I take it to be like a trumpet — using musical scales, C c GGGGG; using do-re-me, DO-do-SOOOOOO. Or using musical intervals, the third note is up a fifth from the first two. TAN-ta-RAAAAA!
I think that sounds more dramatic than celebratory. Also I seem to be forever associating it with something from the Worms game. Maybe launching a flying sheep?