As a child, I used to see/hear some pretty weird things around the house. Tree leaves would sway in the breeze to form words and even sentences. I very vividly remember having a conversation with one of the trees; I would speak, and the leaves would shift to form a response. Objects would often go missing or be in a different place than you remembered leaving it (my watches were always missing).
It wasn't until years later that my mother told me that the house was inhabited by a Wiccan and was very likely haunted.