The exact original source of this short Phil line is not clearly documented in the clip itself, which is common for brief voice sounds shared and re-uploaded across soundboard communities. Its appeal comes from the recognisable situation rather than a famous scene: everyone has heard, or made, an unconvincing promise before a first attempt. That makes it easy to reuse in memes, edits and reaction videos, where a two-second confession can set up an awkward moment, irony or self-deprecating humour without needing any extra context.
About this sound
A short voice clip of Phil saying it's his first time and vowing so, used in funny edits and reaction videos for awkward or nervous attempts.
This is a brief, deadpan voice line in which Phil admits it is his first time and adds a promise that he means it, delivered in a slightly nervous, earnest tone that makes the reassurance sound less convincing than intended. The clip runs for just over two seconds, so the joke lands almost instantly, with the pause before the promise doing much of the comic work. It feels like a confession caught on camera, awkward and sincere at once, which is why it works well as a reaction to a clumsy attempt, a beginner mistake, or someone clearly out of their depth but trying to look confident.