The sound comes from Donald Trump talking about his own rallies, a subject he has returned to repeatedly while campaigning and defending his crowd sizes against critics. The line about people not leaving, paired with the claim of having the biggest rallies, distils that boast into a single shareable moment. As a short audio clip, it spread through meme pages, reaction videos and political edits, where it is used both by supporters repeating the claim and by critics using it as an example of exaggeration. Its staying power comes from how instantly recognisable the phrasing and delivery are.