So I went to clean the sensor and the mirror wouldn't flip up and the shutter didn't open. It wouldn't unfreeze when I turned the camera off then back on. I had to take out the batteries to get it to unfreeze. Now it will only autofocus and meter. When I press the shutter button, nothing happens except for a brief electronic noise. No mirror slap or shutter crunch.
Looks like it's off to canon repair service.
Le sigh.


