I played through I think four chapters after I got the game today and so far am really enjoying my time with it.  The only problem is that my PS3 has decided that I will only be playing Portal 2 because when I tried to eject the disc, it starts to eject then abruptly stops and eventually goes back into the console.  Can anybody help me out, or should I just be glad that a good game has been eaten?

Eject and then pull plug before it goes back in? 

There should be a screw at the bottom of your PS3. It should be blue. If you unscrew it, then punch a hole in the cover protecting the bottom of that screwhole, then twist it, your game should eject.

It begins.

" I played through I think four chapters after I got the game today and so far am really enjoying my time with it.  The only problem is that my PS3 has decided that I will only be playing Portal 2 because when I tried to eject the disc, it starts to eject then abruptly stops and eventually goes back into the console.  Can anybody help me out, or should I just be glad that a good game has been eaten? "

this is why i hate those little automatic disc-holes (that's right, the holes where the disc goes in). i don't trust them not to break at all. bring back the spring-loaded playstation 1 lid.