I saw this movie as a child, and felt compelled to comment on it, as it is unacceptable that it has no reviews. But, to be honest this will not be very helpful as I can hardly remember most of it.
The brilliance of this movie is the ridiculous pranks (hence the title) executed by individuals sick of getting mistreated. The pranks border on evil, but in a disturbingly hysterical way. Of course, keep in mind when the movie was filmed and how social mores have changed. Perhaps to many viewers the pranks will seem mild, but this was Peru (a very traditional country to begin with), and in 1967.
Without giving anything away, I remember being especially tickled by the prank with the supermarket, and also the prank involving a coffin...good stuff.
