Power button loose?

Hey guys,

I have just noticed that the power button of my MacBook Pro (2010) is a bit loose.
http://youtu.be/-uYOEu8OBzY
Is it also the case with your power button?

As far as I remember, I didn't see the same "problem" with my old MacBook Pro (2008). Maybe it is nothing, but I am a bit worried. The power button works perfectly (very hard to press) and is perfectly flush with the top case. It just moves from one side to another if you gently move it and makes this metallic sound.

Do you know how the mechanism of the button looks like? This is the power button itself:


I am just curious to know what can be found under the button. Unfortunately, there is practically no info about it on the internet.
Can that mechanism become weak after some "heavy use"?

Thanks for your replies.