hi! can someone explain me why some objects dont turn in its axis and fly away in a circle.

example: the bones of one hand; the entire hand turns nicely. But if I want to turn a specific bone of the hand (the tumb) goes away making a huge circle. excuse my english and thanks in advance.

It sounds like the pivot point for the object rotating in a big circle is a long way away from the centre of the object.  You can turn on display of pivot points and move them to where you want them.

thanks a lot, so I can change the pivot point. Very kind of you.

also, here's a good tutorial that discusses moving the pivot point (its for Vue 9, but the pivot point info is the same for Vue 8,);

http://www.geekatplay.com/vue9/

Introduction to Vue 9, Properties, managers, libraries. []
 •Properties windows, camera manager, and object and material libraries