Arcadia's dangerous proximity to darkwoods means plenty of the surrounding caverns are filled with rubbery spiders searching for their prey. It looks like a new fledgling colony of spiders has gotten bold, capturing a group of farmers leaving the village eerily empty. 
They struggle, they squeak, they squirm helplessly awaiting their fate as their cocoons shiver. You can even see them perk back up and struggle with vigor whenever a spider creeps over one of them.