I *knew* this would happen

So I prattled on and on in the class (using about fifty words where Ari uses three to say basically the same thing) blah blah tension, choose the right word, tension, don't go purple but increase awareness, tension, blah blah blah.

And then I sat down to write a scene that's supposed to be brimming with tension.

Two hours later, I've got half a page and it's thoroughly meh.