Rew pai is a common everyday phrase in Thai, used in conversation to tell someone they are going too fast or that something happened too soon. As a standalone soundboard clip its origin is not documented to a specific film, show or creator, so its life online comes from reuse rather than a single source scene. Short foreign language reactions like this travel well on social video because the tone carries the joke across languages. It is now shared mainly as a quick meme reaction for rushed, early or out of control moments.