Patrick Cassidy (Rob) and Melora Hardin (Cindy) previously (1988) starred together in the television version of Dirty Dancing as Johnny and Baby, respectively.
Joanna Cassidy and Patrick Cassidy are unrelated, despite sharing the same surname.
The title refers to the remains of animals that have been struck and killed by an automobile and found on the side of the road, especially in heavily wooded areas or along the sides of highways. In the early 20th century, in the United States, the term was "flat meat".