Other mistake: While Joe is hanging onto a piece of wood, to stop himself from falling into the very deep disused empty well, the eclipse across the sun goes back and forth and back and forth and Dolores looks straight at the sun, which she wouldn't be able to do for more than a second.
Other mistake: At the end of the play, Arbuthnot picks up a newspaper in the dining room and reads an article with a headline about disappearing local people (referring to those the graduates have killed). However, the actual body of text in the article is talking about politicians voting to halt construction of a new Hadron Collider.
Other mistake: When Angela arrived at the hospital to see Alan, the nurse behind the nurses station tells her "we have him intubated and pumped full of epinephrine." When Angela enters Alan's hospital room, he is not intubated.
Other mistake: At the club, Sid likes the blue suit and takes it. But he is still wearing the suit he came in when Denzel's character shows up and is not carrying the blue suit as he leaves. If he somehow had it concealed on him it would have been shot up when he was thoroughly shoot. Yet when we next see Sid he is wearing the blue suit and there is not a mark on it.