A giallo where the two main characters aren't interesting, but the movie gets you on their side anyway. The plot modestly draws us along, and comes together pretty well around a variety of lunatic events. Hilton and Fenech are very good separately here, though their chemistry together isn't as good as in other movies. Hilton does a good giallo-style Cary Grant. And he has a better fight scene than I remember Cary Grant ever having. Frano Augstini gets comic relief and some humanity into the movie out of the stock supporting role of the half-competent, half-bumbling policeman. The camera movement has very little poetry and doesn't contribute atmosphere, but there is a lot of swish-zoom work that doesn't stick out and makes fast connections between framings. Giallo fans could focus on this aspect of the movie alone, because it's a masterly example of the use of zoom and handheld camera in the genre. On the other hand, the movie also has a very generous perception of how much light is created in a dark room by one match. The literal translation of the title is "What are those strange drops of blood doing on Jennifer's body?" Good question. Here's another one: What makes drops of blood on a body "strange drops" of blood? Are they square-shaped or something? In fact, one of the characters is afraid of blood, and any drops that end up on the person of our sexy heroine, Jennifer, are not strange at all, just red and icky like usual. The epilogue of the movie is unnecessary but seems to celebrate all the trashiness that has transpired.