I was seeing a doctor with my three year little cousin and I was talking to a friend how I was scared?

but don't know if that had anything to do with what the little girl came out with. We approached the doctors room and the little girl did not want to proceed any further. She told me that someone has died there behind the door. I think she is very young to know what she means but she was adamant that she did not want to go any further. I tried to reassure no one has died there and no one is going to die here. I did not want to scare her anymore than she was. Does anyone know why she might think like this at her age?