Counting in eights is a long-standing habit in dance and music rehearsal, where an eight-beat phrase gives performers a shared rhythm before they move together. The numbers five through eight act as the second half of that phrase, signalling that the start is imminent without needing any explanation. As a short soundboard clip, it has been picked up by creators who need a clean, instantly understood lead-in for routines, challenges and timed edits. Its appeal is practical rather than tied to one show or song: anyone who has rehearsed, performed or followed a dance trend recognises the cue at once.