It is possible that she thought she was feeling bad due to something unrelated. Regardless, if a radio station is going to hold a contest like this, it is their responsibility to make sure it's safe. From a legal standpoint, the family had the right to sue them because they did not give a warning. And technically, yes, she died from her choices, but even so she did not have the information needed to know she was making a bad choice. I would not have associated headaches with holding myself, and I don't think she did either.