The elf, baggie, and line, "it'd be a lot cooler if you did," were individual materials requirements for the Happy Holiblaze Film Festival, a 3-week film competition. The line is originally from "Dazed and Confused", a Richard Linklater film.
Where did Officer Day shoot the gang leader, Trill.
The DJ use to spin at (Jack's) house parties while coworkers over a decade ago at a steakhouse in Grapevine, TX.
Izy is a nickname for Oizys. In Greek mythology, Oizys is the goddess of misery, anxiety, grief, depression, and misfortune. Her Roman name is Miseria, from which the English word misery is from.
Jack is an homage to "Fight Club", written by Chuck Palahniuk and directed by David Fincher.