Here's a pretty cool project from Mullen for a client we won't immediately reveal, lest we spoil the surprise. (Scroll down to the bottom of credits, watch the video or click here to find out.)

The Boston agency posted this job listing online for a "director of operations" position at a company called Rehtom Inc. The requirements sounded nothing short of brutal:

• Standing up almost all the time

• Constantly exerting yourself

• Working from 135 to unlimited hours per week

• Degrees in medicine, finance and culinary arts necessary

• No vacations

• The work load goes up on Thanksgiving, Christmas, New Year's and other holidays

• No time to sleep

• Salary = $0

The job ad got 2.7 million impressions from paid ad placements. Only 24 people inquired. They interviewed via webcam, and their real-time reactions were captured on video.

Check out what happened below. It's worth watching to the end.

CREDITS

Project: World's Toughest Job

Agency: Mullen, Boston

Chief Creative Officer: Mark Wenneker

Executive Creative Directors: Tim Vaccarino, Dave Weist

Creative Director: Jon Ruby

Associate Creative Director, Copy: Andrea Mileskiewicz

Associate Creative Director, Art: Blake Winfree

Executive Director of Integrated Production: Liza Near

Head of Broadcast: Zeke Bowman

Producer: Vera Everson

Account Director: Jessica Zdenek

Account Supervisor: Laila Lynch

Director of Digital Strategy: Eric Williamson

Senior Brand Strategist: Ryan Houts

Production Company: Caviar

Director: Amir Farhang

Executive Producer: Valeria Maldini

Producer: Jason Manz

Director of Photography: Brian Rigney Hubbard

Editing, Visual Effects: PS260

Editor: J.J. Lask

Assistant Editor: Colin Edelman

Senior Producer: Laura Lamb Patterson

Lead Visual Effects Artist: Patrick Lavin

Assistant Artist: Matt Posey

Audio Post: Soundtrack

Sound Design, Mixer: Mike Secher

Music: Human

Casting: House Casting

Casting Agent: Shawn Alston

Client: American Greetings

Executive Director, Marketing: Alex Ho