Place it immediately after the question on screen, then let the next clip carry the reply instead of stacking another reaction. Follow it with Okay Let's Go when the speaker decides to act, or with Nope when the answer turns out to be a refusal.
Über diesen Sound
This is a short 1.6-second voice clip of Dr Light calmly saying that's a good question in a thoughtful, slightly amused tone. It lands as a playful stall, giving you a beat to think while sounding polite rather than dismissive.