I want to be alone in a large place?

i get aroused at the thought of staying alone in a big place when everyone goes home and the lighs are turned off, like in a school, office, mall, theatre...Especially large areas.
Whenever I stay alone somewhere unusual, even if it's a house i'm not familliar with, I get aroused. It's similar to a feeling when i'm running out of time and i'm not finished with whatever i'm doing yet, so i get aroused. For some reason I just love it.

Normal or not?