Wasn't there last weekend but I've had a couple of odd experiences at places like that before and the one thing that always stands out is the time distortion more than anything else. Like you go in thinking 20 minutes has passed and its been nearly two hours, or the opposite. Nobody ever talks about that side of it.
What specifically felt weird to you? Was it more of an atmospheric thing, pressure in the ears, visual stuff? Asking because I've been trying to log these kinds of reports more carefully lately and there does seem to be a pattern with certain types of buildings - old institutional ones in particular seem to generate more of the time-related accounts than your average supposedly haunted house.
Also did anyone go in groups or was it solo? In my experience the group dynamic changes what people report quite a lot and I'm not sure anyone's really looked at that properly.