Place this after a question or reveal in your edit, then follow it with a huh reaction for extra confusion, or precede it with a wrong answer buzzer when someone has just guessed badly in a quiz-style sequence.
حول هذا الصوت
A very short voice clip of a person flatly saying "I don't even know" in about a second. It captures that blank, caught-off-guard moment when you have no explanation at all. The delivery feels bewildered and a little sheepish, which makes it funny as an honest admission of total confusion rather than an excuse.