Cambridge Latin Course/YMMV

Accidental Innuendo: In spades, especially if you're learning Latin and tend to make mistakes translating it, many lines can come out having a completely different meaning to what they are meant to. Even some of the properly translated lines tend towards this.

Domicilia est anus.

Complete Monster: Salvius. Within the first stage of the second book, he's killed four slaves - one for being sick, one for trying to avenge his father (that Salvius killed), and the two guards for "being in on the conspiracy". Then he got worse.
Crowning Moment of Awesome: Clemens befriends a cat that lives in the Temple of Isis in Alexandria. Said cat attacks the head of the local mafia.
Ensemble Darkhorse: Grumio. The drunk, dishonest, ladies' man of a cook who went as far as impersonating a Roman citizen. The course is used in a lot of high schools.
Magnificent Bastard - Salvius
Memetic Sex God: ancillae Grumionem delectant. ^[1]
Tear Jerker: Cerberus the dog standing guard beside Caecilius' corpse while Vesuvius erupts and buries Pompeii.