I think I screwed up a Mac...

[OfaLoaf]

I was at my neighbor's house yesterday to help work on a school project. Nothing was happening at the time, so I decided to show them this (commercial) CD with some music I thought would be good with the project. ITunes didn't read it at all when I put it in. So we popped it out and put it bck in. Still nothing.
So we decided to screw that, but left the CD in there.
Now, still nothing was happening. So I started up the neighbor's copy of Warcraft3. My mom critisized me for doing it, so I closed it. Then, after another period of nothingness, I tried to start up his copy of Halo for Mac. It asked for a CD key I didn't do that.

I then remembered that the CD was still in there. I pressed the "pop out CD" button. Nothing.
Now the mac doesn't read the CD drive in there at all, my CD's still in there, and my neighbor appears to be angry at me for it. What can I do?