"Chocobos are the ... very large birds used as mounts, right?" He's never seen one by his tone, but he's heard about them!

That would certainly make a cavalry a lot more sneaky. And portable. "..Actually if you think about it, being able to put animals in a ball.. could have a lot of really useful applications. Like sneaking through restricted areas with them." No pets allowed? No problem! It's just a ball, officer!

But if animals could be kept in them.. could people? "I wonder if you could sneak people around the same way."