Does a human being know they’re dead once they die?

Yes they do. Mine was my experience with my best friend when she passed away as at around 7 pm ,I was all alone in my room reading my favourite book and then someone knocked at the door and I opened to find her crying 😭 in front of the door I was like Erica come in why are you crying and she said she can't come that she came to tell me good bye 👋, I was so angry and terrified at Same time because we were best friends and we had no dispute or whatsoever I was wondering why the sudden issue's. So immediately she left I got back inside and dressed up to go to their house, that was when my mom drove in and came to tell me that my best friend Erica had passed on. 😭 😭😭😭 It still feels like a dream I can't believe what happened like damm ! I missed her so much. I can't type further because remincing the memories and all brought back everything that happened . Over 20 years ago.