Portal 2 Replay - Interesting Stuffs that I missed the first time

This is the list of potentially interesting &/or intriguing stuffs (secrets, easter eggs etc) in Portal 2 that I missed or didn't notice in my Blind LP of it. I plan on showing these on my speed-replay of Portal 2.

You're probably here from the Portal 2 Update Video. So please inform me of any other interesting bits in the game that I missed & I will update this list accordingly. Thank you :)

1. Destroy all the cameras (that are possible to destroy).

2. See how far I can take the turret from the escape from GLaDOS level & how far I can take a (& how many) deactivated turrets in that level?

3. How can I destroy the turret behind the grate in level 16?

4. Missed a secret room in start of episode 14 :(

5. Easter Egg Name behind Potatawesome.

6. Mess around blue gel dancing cube room - episode 32 :P

7. Missed a secret room after the first speed gel room in episode 35 :(

8. Possible easter egg in the room above the place where we find GLaDOS being eaten (probably a secret door behind some boxes) :(

9. Smash ALL the Wheatley screens in all the testchambers they are in (apparently only the ones in the testchambers actually count).

10. Something moving near the exit as soon as you see it in the funnel, speed gel, frankie chamber - episode 49 :O

11. Does Wheatley really kill me with the spiky walls or just keep on talking?

12. Return after Wheatley tries to kill me with the spiky walls & listen to him :P