Do you know ghosts really exist? How and what have you had happen to you?

yes but im really a wimp when it comes to these things, ive seen a little girl before and it scared the crap outta me. and when i was little our apartment was haunted. i never discussed it with my mum until recently and she said before me that she saw a man standing by the closet connecting her room to me and my sis's room and told him to leave,but he never did cause me and my sis would always invite him to stay and play cause we didnt know better. me and my sis had no idea our mum saw him too. and im gladdddddddd that i moved out of there haha.also not me personally but my mum works in a hospital and used to work nightturn,and seen sooo many things there overnight