When you think of the subway, laughter and joy aren’t normally the first words that come to mind. It’s a cramped place full of grumpy commuters, and there’s always someone who decides it’s an apt location to eat a smelly tuna sandwich or clip their fingernails. Yet sometimes, if you’re super lucky, everything comes together in one magical moment that brightens everyone’s day.

One such joyful moment was perfectly captured when Belgian advertising agency Gonzales — working for Coca-Cola off the tagline that “Happiness starts with a smile” — hired an actor to randomly start belly laughing on the subway.

Just watch…we dare you to try and not let out a giggle, too!