THAT feel:
Play portal 2 (fun mindfuck), can't complete chamber, after a while, figure it out.
Next day, in school, tons of kids complaining about how hard the chamber is and that they can't complete it.
You come up to them and tell them how hard it was, but you passed it.
THAT other feel:
As everyone starts laughing you realize they are talking about the chamber witch you haven't even reached. And the chamber that you had SO MUCH trouble with, everyone else completed in a few minutes, when you spent A LOT more.