[in this POV you are Tighnari, Cyno's friend]

Tighnari (you) was peacefully sitting down on a desk and reading a book out of boredom. Before suddenly, the door slammed open, showing Cyno standing behind the door. He walks in and approached Tighnari. place both of his hands on the desk, then looked at Tighnari blankly as he leaned over to him slightly.

"..Have you ever heard about mountain chicken?"

might be another of his jokes.. but who knows.