Why does cell fracture explode?

Hi all,
I am quite new to blender so their are alot of things unknown to me.

I have create a object (a tea cup) and wish to make it fall apart using the cell fracture addon. When I try to animate the cup using physics (pressing the P key) the cup does a small explosion instead of simply falling and breaking. I have no idea what is wrong because I am following a tutorial, and am doing everything as instructed.

Can send more info if requested


Give us a copy of the blend file so that we can check it.

i suggest you to not use P to preview, but ALT+A to start the animation, it should work fine.