Early in the film, the person in the emergency room's heart flatlines; asystole or absence of any electrical activity. Shocking or defibrillating will do no good in the absence of cardiac activity. The proper treatment would be to give intracardiac epinephrine, followed appropriately as necessary.
When Bruce Dern and Jason Patric are sitting in the car looking at the mansion, about 30 minutes into the movie, the reflection of a crew member is visible in the chrome of the driver side rear view mirror.
Kevin 'kid' Collins: I'd like to correct an erroneous impression you seem to have about me. you see, I'm not at all stupid. I may sound like I am, but I'm really not.
Kevin 'kid' Collins: [voiceover]
There's something inside of every man that keeps him going long after he has any reason to. For years I kept going when going didn't seem to make any sense. And now I just had to keep going. I had to have the end come.