Is it possible/what happens when you clear the pool table?

In Duke Nukem Forever, right near the start of the game before you get in the lift, there is a pool or snooker table.

I have been trying for ages now to clear the table by sinking all the balls, and am getting fed up, but, the closest I can get is one ball away before potting the white and the game restarting.

I am guessing it is possible, but does anyone know what happens?

Right, after what must of been around an hour of trying, I finally managed to do it!

Duke says "Too easy"

The twins say "You're the best, Duke"

And, Lunboks was correct, you get +2 ego.

This early on in the game, I am not sure how valuable 2 Ego is, but, I can tell you this was the most boring waste of time! I have heard the "s***" word probably close to 100 times and whilst funny... it gets so boring!

To anyone else trying, a little hint is that if you think the white ball is about to go in, try hitting it again as you do not need to wait for it to finish, and if it goes too fast, instead of going in, it just bounces again.