Very hard to explain has circulated as a short reaction clip from user generated soundboards, where brief spoken phrases are shared under creator handles such as GreenComma. Its exact original source is not widely documented, so its life online is defined more by reuse than by a single scene. Editors lift the line as a caption in audio form for moments that resist a neat summary, from strange clips to tangled stories. The phrase stays useful because it fits almost any confusing situation without needing setup, context or a follow up explanation.