The role of an assistant director on a film includes tracking daily progress against the filming production schedule, arranging logistics, preparing daily call sheets, checking cast and crew, and maintaining order on the set. They also have to take care of the health and safety of the crew. The role of an assistant to the director is often confused with the assistant director, but the responsibilities are entirely different. The assistant to the director manages all of the directors in development, pre-production, while on set, through post-production and is often involved in both personnel management as well as creative aspects of the production process.

Unearthed & Untold: The Path to Pet Sematary (2017) Review
As a stand-alone documentary, even the titular Pet Sematary itself couldn’t bring this dead horse to life.