Everyone who is riding in this train are pregnant women

A train full of pregnant women 

The Bellysattva leads a branch of Buddhism called “Fat Buddhism” that is about liberating yourself from social norms, diet culture, and inhibition to escape samsara by getting fatter and fatter. He is kind to everyone, and enjoys feasting and fattening others in equal measure. As a Boddhisattva, he has magic food-related powers such as chanting fattening mantras, conjuring feasts of Buddhist food, and flying with his farts after a big meal.