sentences:  One evening, he serenades "Katerina" outside her sorority house (Friedrich von Flotow's aria "M' Apparì Tutt' Amor"), with Cyril providing guitar accompaniment.When her boyfriend Rod finds out, he and some of his fraternity brothers beat Cyril up, mistaking him for Dave.Though Cyril wants no trouble, Mike insists on tracking down Rod and starting a brawl.