Share your stories with a sceptic

I LOVE the idea of the unknown. I don't completely rule out ghosts, but over time, I stopped believing because I've never had any personal experiences and can usually explain "paranormal" things logically. However, many things happen in life that seem to defy our understanding of our surroundings. 

Has anything strange, supernatural, or unexplainable ever happened to you that left you confused? Like, has a door slammed on its own that wasn't caused by the AC or an open window, or did you see or hear something odd while fully clear headed and conscious? I'd love to hear your stories! :D