I have a mac air 11 inch, and when I tilt the screen to certain degrees (either almost closed or almost opened), it would either close by itself or open completely. I was googling this up and saw this video with a 13 inch that shows the same looseness from the hinges. Is this how most macbook airs are? I have an STM grip hardshell case on mine which may contribute to excess weight that burdens the monitor. Here is the video showing a mac air with the hinge situation that I am facing for mine. http://www.youtube.com/watch?v=CH4XDgGW_dw I forgot to test the mac airs at bestbuy and the applestore, but I may do that sometime later.