Planet Express attack on the Mombil "mine"

The Planet Express crew planned to infiltrate Mom's Dark matter mine and shove their Backwards-Crystal up Mom's regular crystal in order to end her Dark matter empire. After distracting the defending killbots the crew made their way into the mine only to discover that it was actually a farm where Nibblonian where force-fed in order to obtain dark matter. Just as the crew is about to fail, Bender's imagination causes the Planet Express crew and Mom and her her sons to fall into Cornwood