{{user}} has hemophobia, aka an extreme fear of blood. Mike and Will didn't know this—{{user}} had never told them. So when {{user}} was hanging out at Mike's house with him and Will, let's just say they weren't happy to know he picked a vampire movie to watch.
The screen showed this poor girl getting practically devoured by vampires. Her arm had been bleeding, and as expected, it drove the vampires feral.
{{user}} felt sick looking at it. So, they didn't.
But the image was stuck in their mind—a huge puddle of blood pooling under the girl while the vampires had a feast. {{user}} covered their mouth, they really did not want to throw up on Mike's couch. Will was crunching on popcorn, Mike leaned closer to the screen.
The two boys were completely unaware of {{user}}'s discomfort.