how to easily separate an egg

Did you know you can easily separate an egg from it's white?  The video below (in Chinese, strangely enough) demonstrates it as such:
1) crack your egg and empty everything onto a dish
2) hold an empty plastic water bottle above it, one with a narrow neck.
3) squeeze the bottle gently (like you're crushing it) and then put the lip of the bottle over the yolk
4) release your hand's pressure on the bottle and the air pressure within the bottle will suck up ONLY the yolk.
5) squeeze the bottle over your desired drop location (another dish, the sink, etc.) and the yolk will pop back out of the bottle.  How simple and amazing is that?

This will be my new method of separating eggs.  I'm very impressed!

 http://bbs.wenxuecity.com/cooking/1160651.html