impromptu hashtag performance

Spontaneous, unplanned, spur-of-the-moment, unprepared, casual, natural, unrehearsed, authentic, real-life, unexpected, quick, immediate, raw, fresh, off-the-cuff, genuine, candid, unscripted, improvised, intuitive, in-the-moment, reactive, energetic, fun, relaxed, informal, creative, lighthearted.