The entire story makes no sense how can it be interesting when none of this would happen in real life, Peoples reactions are poorly scripted. Parts presented as emotional again make no sense whoever wrote the script has no idea how humans interact. No research or studies on the affects of sleep deprivation have been done before making this movie. It is not clear how many days people had no sleep for before they became aggressive toward each other. It appears they did so within 24 hours? I personally stayed awake for 36 days giving 24 hour care that required a sharp clear mind at all times. At the time I was age 24. I would sleep for 1 hour timed every 4 days while another person took over. I experienced no anger, hallucinations or anything like the people in this movie. On another occasion I also had no sleep no food and no drink for 12 days I experienced no dosing off no anger and no hallucinations at age 33. This movie is not in the fiction and boring genre where it belongs,