"Oh, woe is me!"
As mentioned before, Ernie seems to have gotten better at getting mad between yesterday's sketch and today's, because today he's totally convincing. Or, to put it another way, perhaps he's good at pretending to be angry but not very good at actually being angry.
One of my favorite things in the entire universe is that sort of high-pitched, nasally whining noise that Frank Oz makes. He does it here as Bert, he's done it as Grover and Miss Piggy and Yoda, and it makes me laugh every single time.