April Fool's car accident is no joke. It's a promise.

Photo of 2013 Prom Promise (St. Johns Fire District)

LADSON, S.C. (WCIV) -- Three fire departments, four law enforcement agencies, first responders from several rescue teams and the county coroner are all responding to a horrific crash near the Coastal Carolina Fair grounds.

Thankfully, no one is injured and the vehicles, while damaged, never actually crashed. Well, not on this day anyway.

It's all part of "Operation: Prom Promise," an event designed to share information about the dangers of driving under the influence of alcohol with teenage drivers.

The St. Johns Fire District is shooting a public service film for "Operation: Prom Promise 2014" on April 1, from 9 a.m. until 2 p.m.{} in the parking area to the left of the main entrance to the Coastal Carolina Fair Grounds.

The project starts with a 911 emergency call. That's when several agencies jump into action and head to the scene of a mock vehicle accident.

When the responders arrive, they will treat the scene like a real-life accident, but with an audience.

Students, hand picked from the Teen CERT program, will witness all of the actions that take place at a similar, tragic collision.{}

The resulting film will then be used at participating schools during a mock DUI trial with actual judges and attorneys who have donated their time.{}{}

Other agencies involved include the Isle of Palms Fire Department, South Carolina Highway Patrol, Charleston County Sheriff's Office, C & B Fire Department, Charleston County Rescue Squad, North Charleston Police Department, City of Charleston Police, Teen CERT, Charleston County Coroner's Office, Coastal Crisis Chaplaincy, Charleston County EMS, and Med-Trans Air.