When I was a kid I had a kitten named Eevee and she got out one night and drowned in our pool. I shit you not, about a week later I was laying the couch with my cousin and started hearing purring, no other cats in the house. Then we felt her presence like nobody's business to the point that we were both in tears. I would say it was just my little kid brain doing it's thing, but he felt it too. I believe in ghosts to this day and so does he.