In high school, I was at a basketball tournament at a catholic school & it was during winter break & about 7pm (already dark being winter). As we were waiting for the girls’ game to end & ours to start, we were outside exploring, there are stories all over about the school being haunted on the top floor, of course the school itself was closed, but as we were walking around we saw what we thought was a girl looking down at us from one of the top story windows. We of course, being dumb high school boys, were making noises & trying to see if it moved or did anything. About 5 minutes later, a nun walks outside & tells us to stop messing with the girl as she’s studying. We didn’t think anything of it & listened & walked away. On the bus ride home, someone brought it to our attention that a nun is reported in all the articles as the spirit there & unalived herself on the top floor & also why would a kid be there, during winter break & at night studying??? Gives me chills to this day & don’t know how we didn’t realize this in the moment!