Hahaha...though seriously I see you are in Vancouver. If you were in a "earthquake" country area I would not recomend any sort of mirror over head. My uncle had a mirror not on the ceiling but above his head on the wall where he slept. He lives in California and a few years back (1994) or so when the last pretty major quake occured the mirror flew down and probably would have shattered right on his face if not for complete luck that his dog woke him up extra early for some reason.
Basically though I just said this so you know that a mirror slamming down on you is bad