You look at a herd of cattle and well they all look the same... but they know. They all have an individual personality and those personalities change from day to day. They can have their grumpy days and their happy days and their serene days. But it's unpredictable. You can't be off in outer space when you're dealing with animals.
We have so much pride in welcoming these passengers onto the plane and they have so much pride in travel. It's something that I definitely always remember when I'm playing a scene on the plane just to imbue everything with that sense of excitement.