Use it as the middle beat in a short edit: open with the odd claim, add the hmm next, then follow with Anime Wow for a bigger surprise or Dramatic Dun Dun Dun when the reveal turns serious.
About this sound
This half-second voice clip is Gorori, the bear-like character from Tsukutte Asobou, giving a short questioning “hmm?” It feels puzzled and mildly suspicious, like someone caught off guard by something that does not add up. The sound comes from the Japanese children’s craft programme on NHK Educational TV, where the character appeared alongside host Wakuwaku-san.