Dr. Laurentz snapped his finger
“Yes,” Sarah threw her hands up, “yes I fucking changed all of them. I had no choice—don’t you see that? Jonathon doesn’t deserve what we were going to do him. If anybody does, it’s me.”I think it should be: "Yes." Sarah threw her hands up. "Yes, I fucking changed all of them.....Jonathon doesn't deserve what we were going to do [to?] him......"
Sarah jumped up from her seat as well, dread welling up like a brick in her stomach.saying "as well" slows down the action, speed, and drama of the sentence IMO.
Sarah shrieked as he and the two men turned and walked through what looked like walls. The sound of machines lowering something filled the room. Sarah jumped over the table and saw two walls being lowered over what she had previously thought were walls. She ducked down in time to see they were only very well disguised corridors, but it was too late to run through them.Very confusing. I have no idea what I am supposed to be picturing. Same with everything else in this....what size is the room, large? Those walls-that-weren't-walls, I can't "see" them.