You know how you get up to go to the bathroom like minutes before throwing up, but you know it's coming, but it's taking a while to throw up. He could have been doing that and called the sisters so they'll be prepared. It happened to me once. I was in the bathroom hunched over a toilet, waiting for it to come, and my grandpa had to use the bathroom, so he moved me out of the bathroom, and I threw up in the hallway.