Little is known about the original recording behind this clip, beyond its short length and informal spoken delivery, so it is best understood as an online reaction sound rather than a line from a named film or show. On soundboards, very short voice clips like this survive because they are easy to recognise, quick to reuse and flexible enough for many jokes. Riki dice oh fits that pattern, giving creators a compact way to signal surprise without adding dialogue, music or a longer explanation to a scene.