 While at Cinecitta studios filming the scene of Cleopatras  triumphant and spectacular entry into Rome, a scene requiring  thousands of extras and the transportation of a huge barge carrying  the Queen of Egypt, Joseph L. Mankiewicz (qv) had to cut the  scene, roll back the barge, and begin again because one of the  productions Panavision cameras had caught an enterprising film  extra, in the heat of the Roman summer, hawking gelato to his fellow  extras.