I believe in ghosts, never seen one but seen some weird shit. these are my experiences. we had a capenter come around to fix the stairs, he took a shining to my mom. He would always come around out of the blue and see if this or that needed attention. Well, he died, bit cliche but most nights around midnight we would hear three loud bangs on the stairs right where he had been working, always three bangs. We used to invite people over to witness it. Then if you stood at the top of stairs you would feel a presence. It stopped after a couple of years.
a great friend of ours passed, me and my uncle were outside drinking a few beers lamenting. There was no wind, it was a nice night. Then a beer bottle tilted over and clinked with mine but it didn't fall or roll off the other glass bottle, it stayed perfectly balanced. That same night a mouse jumped on my uncles head. this mouse needed to jump about three meters in order to make it to my uncle.
my friend has a house built in medieval times. Twice I have seen a black figure like someone dresed in a cloak standing at the doorway of my bedroom. first time I was reading a book and looked up I thought it was my friend standing there doing something so carried on reading. second time I was just waking up from a siesta and there it was again. I just rolled over and thought 'ya'.
Technically I have been a ghost too, so I'm pretty sure they exist. we're meant to send them to the light apparently.