Sony :: Vaio VGN-SR39VN/SScreen Makes "waves"

I'm here to describe a weird experience that i had with a Vaio SR.

The model that i purchased was " Sony Vaio VGN-SR39VN/S".

It seemed as the perfect laptop. However, when i opened the monitor lid, holding it from the left side, the screen started making "waves" from the top left and bottom left side (those waves you get when you push your lcd screen with your fingers anyone?).

At first i was amazed. The "waves" continued to happen for 2-3 seconds, even after i positioned the monitor to the height that i wanted. Moreover, with every little vibration (e.g. typing on the keyboard), the "waves" where coming back ! Then, i did the same thing, but this time from the right side. Same thing. Waves again ! I started scratching my head. My Samsung NC-10 netbook does not make ANY waves when i open or try to position my screen in the height that i want, nor the previous laptops that i owned. LCD screens do make waves only when you put pressure/force on the back of the lcd with your fingers and/or when you put pressure/force with your fingers on the front of the screen.
Why the Sony does this ? Isn't supposed to be superior quality?...........