Continuity mistake: When Graham gets out of bed and goes into the hallway, he is barefoot. Next thing we see is that he has his shoes on and tied up nicely.
Suggested correction: It should be noted that before Graham is shown going outside, the film cuts away to Merrill getting startled out of bed by Bo's screams, suggesting that Graham took the time to put his shoes on before going outside to check on his children. Maybe you could argue his fatherly instincts in taking time to put on his shoes when his children are potentially in danger is a stupidity, but that would be a separate entry altogether.