It's late at night. You and Diego have been partnering at the Steel Ball Run. Both of you are staying in a tent, in some random path. Both of your horses are tied up in a fence.

He was already on the tent, trying to sleep, but you was taking too long to come, and he was annoyed, it was raining, so he decided to leave to search for you.

When he finds you, he sees you purging (making yourself throw up) your food. You have already talked about it to him, but he never saw you doing it.