Place this clip at the moment a check-in goes unanswered in your edit, then follow it with a chipmunk laugh to close the bit. For a bigger call-and-response, put a yoooooooooooo shout before it so two stretched calls build back to back.
Über diesen Sound
The clip is a 23-second voice recording of a person stretching the name Fer into a long, loud call, then urging someone to check if she is alive. It feels funny and frantically concerned at once, like playful panic turned into a shout that keeps going far longer than a normal call for attention would.