Katie Holmes didn't feel like she had much of a choice when it came to taking on the starring role in Guillermo del Toro's Don’t Be Afraid of the Dark. As she told Charlie Rose last night, "When it comes to Guillermo, you say yes because it's Guillermo — he's incredible." However, while the horror movie (out this week) may have been a good career decision, it doesn't seem like it was the best thing for the actress's mental state. Apparently, the script alone was enough to make her paranoid. So, does she just scare easily, or is del Toro's project actually really horrifying? If Katie's claims of Dark-induced sleep disturbances and auditory hallucinations are true, then we're inclined to believe the latter, if only because it seems like it would take a lot to rattle someone who spends so much time dealing with Tom Cruise. Or maybe it's just the opposite?