Sounds like he may have broken it. Why would he bend it backwards and not inwards?
Try folding it in and back to make sure it's seated right, and adjust the mirror to make sure the gears aren't just out of alignment.
Edit: if I remember correctly, sometimes on my F82 the mirror tilt down would be loud or jumpy. When I adjusted it with the electronic controls it would "click" back into alignment like somehow it just got off its rails or something
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