I kind of like some of the "breaking the fourth wall teasers" on The Simpsons, where it looks like the fourth wall is being broken.
Such as the end of "Who Shot Mr. Burns Part 1", when Dr. Hibbert says "I can't solve this mystery. Can YOU!" He appears to be staring and pointing at the audience, but then the camera pans back, revealing that he was talking to Chief Wiggum.
Or in another episode. I forget the title of it. But the Simpsons have to get soem family counciling, and they go to the woods. They end up working together to save each other. Later, when talking about what just happened, Lisa says, "Could this be the end of our series?" Everybody looks at Lisa, and then she adds, "Of misadventures?"
And it's funny in "Homer Loves Flanders" when Lisa tells Bart that Homer will go back to hating Flanders soon and they can go back to their wacky adventures. But then at the end, when Homer still hadn't gone back to hating Flanders, Lisa comments that this could be the end of their wacky adventures. But then we get a preview for a ficticious next episode, featuring a brief scene of Homer telling Flanders to get lost, to which Bart and Lisa smile.
And the ending in the Family Guy episode "Tales of a Fourth Grade Nothing" was funny. "Mr. Griffin, you'll be in jail for seven days. You'll be out next sunday at 9."
I also like the line at the end of the Darkwing Duck episode "Comic Book Capers".
And there's a scene in the Muppet Babies episode "Good Clean Fun", where Gonzo cleans the TV. We see Gonzo cleaning from the TV's point of view, and after cleaning, Gonzo says "There's still a spot! Maybe it's on your side."