Mystery Noise

My laptop was making this strange noise recently. Whenever I would tilt my laptop forward, or backward it sounded as if something on the inside broke loose and was sliding. It concerned me at first, then I discovered that everything was functioning properly, so I figured it'd be fine.

I didn't know what was causing it. That's what bothered me the most. there wasn't an answer to what was causing this noise, and I sure they hell was not about to take my lap top apart and ruin it in the process.

But just now, I was watching a little program on my laptop and there is there little drive of some sort on the side of my laptop (which if you've ever seen my lap it looks like it's straight from the 90's)

I, being bored with this program pushed down the flap and looked inside. Something goldish in there! I strategically put a bobby pin in to hold down the flap, and then tilted my laptop to the side. The edge of this mystery object came out. I slid it out, only to find a gold button. Like I button for a coat, or something.

Now, what is going to bother me is the mystery of how the hell this button got inside my laptop.