Half-bang has spent a lot of cookies to buy all that popcorn, and Star has spent a lot of them to disrupt the scheme (although I guess she is the one behind cookie emission control so she has an endless supply). That means that basically everybody else has ended up with a lot of cookies now, and cookie inflation is imminent...
Half-Bang learning a valuable lesson in entrepreneurship - Always make sure you have the supplies to make your product.
Clumsy about to learn to... Look out for overhead hedgehogs I guess.
A note to any potentially confused latecommer: "Clumsy" in this case does not refer to the nun we currently know as Clumsy, but rather to Leaf nun. Who is clumsy too, but she's not Clumsy.