Is there a bone I can pop to become more flexible?

[sk8tr_grl88]

my friend was telling me about there being a ball that pops you're bone and you become more flexible,
does anyone know what it is?

 

[BasketBoy]

Well, don't try anything that can damage your bones. It'll hurt and cause you a lot of pain, so I suggest just don't do anything about it unless it's recommended by a doctor.

 

[Justin]

this friend seems like trouble