My cousin and my aunt had recently moved into a new apartment, and while I was hanging out there once, my cousin told me that they had a ghost. I didn’t believe them AT ALL, and a couple of weeks later we had a sleepover.
We were having some drinks and eating pizza in my cousin’s room when — from out of the corner of my eye — I saw a man go from the hallway to the restroom. He looked see-through, but you could clearly make out that it was a man with blue jeans and a white shirt on. It creeped me out so bad that I didn’t know what to do, so I turned to my cousin and explained what I’d just seen. He calmly confirmed that it was the exact same person he’d been seeing. I’ve been a believer since then.