When the person promoting the product is putting on “the grimace,” the market has a field day.

In case you’ve been napping, McDonald’s launched its new Big Arch burger in the United States this week.

Two all-beef quarter-pound patties. Three slices of white cheddar. Lettuce, pickles, two types of onions, and a new tangy “Big Arch Sauce,” all on a sesame-poppy seed bun.

It’s a lot to take in. Literally.

At around 1,020 calories and roughly 8–9 bucks for the burger, it was positioned as the chain’s “biggest and boldest” offering.

The launch created enormous attention.

But not in ways the brand wanted.

An Instagram video of McDonald’s CEO Chris Kempczinski tasting the burger went viral as the product launched.

Instead of delight and excitement, viewers saw sheer awkwardness and mysterious hesitation to dig in.

He called it a “delicious product,” studied the sandwich as if calculating the correct approach to eating such food, then took a cautious nibble before pledging to eat the rest for his lunch.

It felt like a boardroom demo that should have ended right there.

Fans never talk about burgers that way. And McDonald’s insiders call theirs “sandwiches.”

True burger fans attack the food with gusto. (And relish, if available.)

Social media immediately reacted to the Big Arch stumble. The laughs and digs reverberated around the world.

Competitors like Burger King and Wendy’s responded with their own enthusiastic burger-bite videos, leaning into the contrast.

New memes are still popping up.

The “product” itself might survive, and time will tell if there’s no such thing as bad publicity.

But the marketing signal has already gone off in a bad direction.

The moment a brand ambassador looks unsure about a product, the market has free rein to question it too.

The lesson isn’t only about burgers, but about who really has authority and cred with your audience.

If someone doesn’t genuinely love the product, they shouldn’t be the one promoting it. Even if they’re the CEO.

Who in your company is most clearly a fan when they talk about your product?

Want to make your product irresistible? That’s what we do as product go-to-market experts at Graphos Product, helping innovators turn need-driven ideas into market-ready successes.