it was n't the etruscan dance with its forceful rhythm , the harvest-dance that hypnotised with its slow stamped beat ; it was n't the greek dance , artful and mimetic , not the roman shield-dance with its acrobatic leaps and martial posturing , but a mix of all of them , melded together into a varied choreography that contrasted frenzied passages with slower , more fluid movement , till at the end the two dancers accelerated into a duel , each leaping the other , higher and higher till at the end , they joined hands and spun around each other , faster and faster , their bodies leaning further and further out , their movement dizzy , their limbs now a blur of speed .