The phrase is Russian slang expressing stunned disbelief, roughly equivalent to what the hell, and the clip combines that shout with an explosion sound for extra effect. This style of short Russian reaction audio spread widely on meme soundboards and in short-form video edits, where creators rely on the tone and the sudden boom rather than a translation. It remains popular because the pairing is instantly readable as shock, anger and over-the-top comedy in under two seconds.