How do I tighten the screen hinge on my Macbook Pro (2010)? I have a 2010 MBP and the screen has started to wobble - not un-usably, but just enough that when it is sitting on its stand the screen bobbles around a little when I type. 

I took it back to a Genius at the Apple store and he said this was expected behaviour, and because it held its position, they weren't able to do anything about it. With that said, he was in a massive rush and running waaay behind - and I wanted to get a second opinion. 

Should it sit still / can I ask them (within the 3-y Applecare I bought) to tighten it? Or is there anything I can do?
Try calling Apple Care, and or taking your MacBook Pro to a  Apple Authorized Service Provider, they may offer a much higher level of services satisfaction than a "really busy" Apple Retail Store in my experiences (East Cost, USA).