Maybe not really "Old" but, old by college girl standards...
You have been in the industry for quite some time and you are there just because you need the degree to move up on the ladder... much of the stuff you already know. Then you find yourself sitting there listening to some mofo giving a ******** explanation of something. You look around and see a WTF face on every classmate and silently execute a facepalm maneuver because you know you could have done a better job at explaining the matter at hand.
Sometimes you just want to get up, grab the marker out of the professor's hand, smack him in the head with the eraser, hijack the class and explain your classmates the stuff yourself.
Do you? Ever?