When You Crack Your Knuckles हा मोफत व्हिडिओ पहा

(9.11 MB) 19 Feb 2018 रोजी जोडले 175 वेळा खेळले शैक्षणिक Tutorial How it works Health

अ‍ॅनिमेशनचे वर्णन:

Here's what happens to your knuckles when you crack them.