Motion study, why you trippin?

Hi,

I'm trying to make a motion study / animation of the following:

- A bunch of poker chips falling in a chip caddy.

Here's the initial position:

I added just a concentric constraint so that they are all free to fall and hopefully bounce a little inside their respective columns.

So I added gravity (lower than actual, around 200 in/sec^2) and selected everything for the solid body contacts.

Now I ran the calculation and this is what I get:

Solidworks Gravity logic - Album on Imgur

It's a GIF video, hopefully you laugh at it as much as I did. . .but what the heck happened? how is this even close to reality? things suddenly start spinning out of control and bounce up to space or something.

SolidworksSimulation