Put it at the start of a reaction sequence, right after the confusing clip, then follow it with Ceeday Huh for a second question before Oh My God Wow raises the reaction. That order builds a clear chain of questions for viewers following the scene.
Über diesen Sound
This is a short spoken Portuguese phrase, 'Que que houve?', lasting just over a second, delivered as a single direct question. It gives a confused, slightly suspicious feeling, like someone walking into a room after something unexpected has happened and demanding an explanation. That straightforward delivery makes the question feel immediate and personal, as if it is aimed straight at the listener.