Regardless of whether you're deeply religious or strictly atheist, there are some inexplicable moments that leave even the most cynical thinkers scratching their heads in awe.
Sometimes it's easier to trust and accept that maybe your dead relative did send you a message, or the weird man who mysteriously protects you from accidents is a guardian angel, because some experiences are truly impossible to explain away, and we don't all have Columbo's detective skills.
Walking through a graveyard yesterday, I stepped on a broken piece of a headstone with just my birthday inscribed on it (Pic included).
http://i.imgur.com/Zznhj.jpg I think the creepiest part about it was that it was just sitting there, no other broken pieces near it, and I happened to step right on it.
EDIT: Wow! Thank you all for sharing! I am sufficiently creeped out and probably won't sleep tonight (that's okay, I have to write a 30 pg. paper this weekend anyways). I really appreciate the response - Especially as many comments have been quite personal/pertain to loved ones that have passed.
To answer a few recurring questions: