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

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

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

One man cracked his knuckles in one hand for 60 years and not the other. Watch the video to see what he found out.

User: Lara Lessano

Views: 1

Uploaded: 2015-03-15

Duration: 01:35

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