"They" said she had hit her head. I remember Moe saying it in an interview, but can't recall who else said it.
Anna Nicole: Media And Mysteries Magazine Editors Sort Through Facts And Speculation February 9, 2007 (Interesting article for early perspective by editors at US and People magazines)
Szish also said it had been reported on Wednesday, the day before Smith died, that she had slipped and fallen and hit her head on the bathtub in her room at the Hard Rock Hotel and Casino.
One more thing for Howie to sue over. He was giving her Demerol because she slipped on one of the Hard Rock Hotel & Casino's dangerous tubs!