I keep seeing this, that it would be hard to fake, but I think some people are missing something. Jesse probably didn't have any experience with seizures. He probably wouldn't know one if he saw one. After all, he was just an aide, as he said. So I'm thinking hospital aide, maybe a candy striper? What are the odds that he ever witnessed a seizure before Casey? I think she could fake it with someone who didn't really know what a real seizure is or never saw one before.
Jesse only described her eyes, her lips, the foam at the mouth, and her being non-responsive. I think all of that can easily be faked. What he didn't describe was some of the other stuff I've seen from people who have actually watched someone have a seizure - spacing out, body movement, vomit, losing bowel control, biting, and from what I know, there's the danger of the tongue becoming lodged in throat and causing suffocation. Seizures are uncontrollable from what I can tell from what I've read. I've never seen one, though. Now, maybe there's a mild kind where not much happens, I don't know. But every person who's described it has described much more activity than what Jesse described, and that's suspicious to me.
Obviously, she couldn't fake out the hospital. It didn't take them long to figure out that there was nothing wrong with her. I think what the hospital did say was only speculation based on what Jesse told them - and again, I don't think he's ever seen a real seizure - that if it was a seizure, it was brought on by too much alcohol and red bulls because that can be a cause of a seizure.
I just think she's a sociopath, and if a seizure got her attention, she would fake it. And she would definitely fake it with someone who never saw anyone have a seizure before, and I don't think Jesse ever saw a real seizure. Probably the only place he ever saw one was in the movies, and those are fake seizures anyway. I'm sure that's where Casey got the idea to do it and how to do it to fool someone who didn't know what a real seizure is.
Or, I could be wrong, and she actually had a seizure. But from what I know about her, I doubt it. The only thing wrong with Casey is her lack of a soul and wanting all attention to be on her. Obviously, she knew if she had a seizure, she would get all sorts of attention, and it worked.