Place it at the reveal of a failed stealth attempt, then follow the attempt itself with the why are you running sound button once the plan collapses, and finish on a shocked sound for the reaction shot.
About this sound
A 17-second voice clip of a young kid earnestly declaring 'I want to be neenja' in a serious, mispronounced delivery. It feels funny and endearing at once, because the total confidence and big ambition clash with the small voice and the mangled word, making the moment sound sweet, silly and instantly quotable.