CANON SX620 made noise when shaking

[secondbanked]

I just purchased a Canon Powershot SX620 HS. I noticed when I put it in my pocket and walked around, it made some noise as if there was a pebble in it. I tried to shake the camera gently, and that noise came up again. I tried to turn the camera on and shake it, hoping mechanism will lock the Image Stablelization in place, and prevent that noise, but the noise persist, so I don't think that noise came from the IS. What could that noise be from? 

[secondbanked]

I have cross-checked with multiple other owners of the Canon SX620 HS. The conclusion is that the camera is perfectly fine. That noise made when the lens covers clap into each other is normal by design.