I don't use twitter. But may I suggest here? Maybe the mouse was had been forced by the birds to betray cactus, but he is so moved by the tragic story that he vows to help cactus in his revenge, and stand up to the birds together. These are so funny XD
"If your pelican, be a pelican, that is right. Fetch him home by all means, you may serve him with greens, and they're handy for striking a light. You may seek him with thimbles and seek him with care; you may hunt him with forks and hope; you may threaten his life with a railway share, you may charm him with smiles and soap. But oh, beamish cactus, beware of the day, if your pelican be a Boojum! For then you will softly and suddenly vanish away, and never be met with again."
Plagiarized shameless from Lewis Carrol's The Hunting of the Snark.