Coca-Cola: Wallet of Happiness Honesty Test

An honesty test on a crowded Lima street

As part of an experiment in a very crowded Lima district in Peru, Coca-Cola with their agency McCann Erickson deliberately left a wallet containing $100 on the street. With it they tested people’s honesty.

A $100 question, asked in public

The brilliance is how quickly the situation reads. Find the wallet. Notice the money. Decide what kind of person you want to be, with nobody asking you anything.

In social experiment storytelling, a simple moral trigger creates instant comprehension and invites viewers to project themselves into the decision.

Why you keep watching

You are not just judging strangers. You are quietly measuring yourself against what you hope you would do. That internal comparison is the engine of the film.

What the experiment is trying to reveal

People’s honesty, observed in a real public setting through a simple, high-stakes trigger.

What to borrow

  • Choose a mechanic that is universal and legible without narration.
  • Keep production minimal so human reaction stays central.
  • Let the audience do the interpreting. A good social test creates its own debate.

A few fast answers before you act

What did Coca-Cola do in Lima?

They left a wallet containing $100 on the street in a crowded district to test people’s honesty.

Where did this take place?

In a crowded district of Lima, Peru.

Who created the campaign?

The post credits Coca-Cola and McCann Erickson.

What was the point of the experiment?

To observe how people would react when they found a wallet with money in a real-world public setting.

T-Mobile: Angry Birds Live

Angry Birds, rebuilt at human scale

In mobile-first consumer marketing, the strongest activations often take a screen-based behavior and make it public, physical, and shareable. T-Mobile’s Angry Birds Live is a clean example of that move.

T-Mobile, together with Saatchi & Saatchi, capitalized on the Angry Birds fever with a viral video titled Angry Birds Live.

In a square in Barcelona, they created a human-scaled mockup of Angry Birds. Lucky participants used the game on a smartphone to launch birds on their castle-smashing journey. The experience included authentic sound effects and exploding pigs, and the size of the crowd made it clear the spectacle worked.

How the smartphone became the controller for a real set

The mechanism was simple and instantly legible. The smartphone stayed the input device, but the output moved into the real world.

That pairing did two things at once. It kept the interaction familiar for participants, and it made the result visible for everyone watching. One person played. Everyone else experienced the payoff.

Why the spectacle pulled a crowd

People do not gather around an app. They gather around consequences.

Angry Birds already trained players to anticipate impact. By scaling the environment up and making destruction physical, the activation delivered the same emotional beat as the game, but with stronger social proof because it happened in front of a crowd.

What T-Mobile was really buying with this idea

The business intent was to borrow cultural momentum and convert it into attention that looked earned, not bought.

The activation created a story people wanted to film, share, and talk about. The brand got reach through the crowd, the recordings, and the viral video itself, rather than relying on a traditional media push alone.

What to steal for your next live activation

  • Move the payoff into public view. One participant can drive the action, but the outcome should entertain many.
  • Keep the interaction familiar. When the input is already known, more people are willing to step in.
  • Design for consequence. Sound, impact, and visible change make an experience watchable, not just playable.
  • Build for filming. If the best moments are obvious on camera, distribution happens naturally.

A few fast answers before you act

What was T-Mobile’s Angry Birds Live?

A live brand activation in Barcelona that recreated Angry Birds at human scale, with participants using a smartphone to launch birds at a physical set.

What was the core mechanism?

A familiar mobile game interaction controlled real-world outcomes, turning individual play into a public spectacle.

Why did it attract such a large crowd?

Because the results were physical, loud, and visible. People gathered around impact and consequence, not a screen.

What business goal did this support?

Capturing cultural momentum and converting it into earned attention, shareable content, and viral reach.

What is the main takeaway for brands?

Make one person’s action entertaining for many, and design the payoff to be obvious, physical, and easy to record.

Share Happy Ice Cream Machine

You approach an ice cream machine that refuses to work for a solo person. It only dispenses when two people participate together. The reward is simple. Free ice cream. The behaviour it creates is even simpler. Ask someone nearby to join you.

The idea. Turn a freebie into a shared ritual

Most giveaway machines are built for speed. Press, receive, leave. Share flips the script. The machine makes cooperation the trigger, so the brand message is performed in public rather than stated on a poster.

Why “team up to unlock” is such a reliable mechanic

It removes awkwardness. People have a reason to talk to strangers, and the machine becomes the icebreaker. The shared reward also creates a shared story, which is why these activations often travel well on social.

What to copy if you run something similar

Keep the rule obvious from a distance, keep the action physical and quick, and make the reward immediate. The success metric is not just how many treats you give away. It is how many micro-interactions you create between people.


A few fast answers before you act

What is the Happy Ice Cream Machine?

It is a vending-machine-style activation that dispenses free ice cream only when people participate together, so the reward is tied to cooperation.

Why require two people?

Because it forces a social moment. The brand message becomes a behaviour. Sharing is not a slogan. It is the unlock mechanism.

What makes this kind of activation spread?

It is easy to understand on video. Two strangers team up, the machine responds, and the payoff is instant. That simplicity travels.

What should you measure?

Participation pairs per hour, average dwell time, repeat attempts, and the share rate of user-generated clips during the activation window.