My F3P's mirror was getting a tad dirty, and so I cleaned it using my mini-vac and its attachment hose. I have done this before with other cameras. This time, though, the mirror flipped forward from the suction of the vacuum. I quickly removed the vacuum attachment, and the mirror went back to its normal position. The mirror looked fine, and, in a couple of tests shots, I did not notice any odd noises or operational issues. Should I be concerned, or should all be okay?