Place it right after the WhatsApp message sound, then answer it with Olha a Mensagem so the missing-item exchange stays in the middle of the sequence as one continuous chat.
Sobre este som
This 30-second voice clip centers on the Spanish question Faltan qué?! delivered as a drawn-out, questioning exclamation that stretches the moment instead of rushing past it. It feels confused, teasing and slightly exasperated, like catching someone mid-explanation and asking them to repeat the missing part. The extended delivery makes the disbelief land harder than a quick one-word reaction would.