Martha cracks her knuckles
Here's a description of the contestant's attempt. Someone's probably working on collecting some images to illustrate it.
Martha is familiar with the concept of ASMR, and knows what it is called. She decides to crack all of her knuckles into the microphone, which Atle seems to think is the sound of someone cracking nuts in front of a cosy fireplace. However, he says there wasn't quite enough to it, and awards it fourth place.
(Written by Karl Craven)