The phrase is Russian, with kto tam meaning who is there and khru khrumkaet imitating a repeated crunching or munching sound. Its exact original source is not widely documented, so the clip circulates mainly as a short meme reaction rather than a quote tied to a known film or show. Online, creators attach it to animal eating videos, ASMR fails and snack theft jokes, where the mock serious question makes a normal bite feel like a crime scene. That simple food based premise keeps it reusable across languages.