Something In My Room moved location while i was gone?

I live In Richmond, CA and had a little issue with an item ive been working on for years. Its a giant scale model of San Francisco. About 5 by 5 feet. Its heavy and very difficult to move around. Well i had it leaned against the wall on top a small dresser. I was fine where i left it this morning and this evening when i returned it was off the dresser and leaned against my bed. Unharmed, nothing my room is missing either. Just curious what would cause something like this? I dont want to sleep in there tonight. I want to leave my GoPro recording

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