I recall inviting my girlfriend to attend our city's ghost hunters' theatre show, which was on the top floor of an old building turned pub.
While we were at the entranceway to the large top floor room buying our tickets, something caught my eye at the end of the room, in the right corner up near the ceiling...it was a swirling vortex of energy. I didn't say anything to her because ghostie things freak her out.
So, the show begins with the ghost hunter president pointing out that some there saw a swirling vortex of energy and she pointed to the right top corner of the room. I don't know why I was surprised that anyone else would see it also, but it was nice to have it confirmed by others.
They later invited everyone to a seance to contact the spirit, but I didn't join in because I was getting bad vibes at the end of the show.