Scientists Cracked Some Joints In An MRI To See What Really Happens

It's referred to as the "pull my finger" study, so you know it's good.

Scientists have found that a bubble forms in your joint fluid when you crack your knuckles.

Here you can see the subject get his finger pulled in an MRI, shown in slow-motion video.

This is another view, where you can see the cavity forming.

It's still a bit unclear whether it's bad for your joints or not.

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