Well, it turns out Daphney did get tired of her balloons and she thinks the only way she is going to get fun new balloons is if she pops the old ones. One by one she bounces on them until they've all exploded except for the very last mylar birthday balloon. No matter how much or how hard she bounces on it she can't seem to pop it. She tries shoving it out the window and slamming the window on it and that doesn't even work so finally she just takes it right out on the front porch and lets it go!