Didn’t this happen on an Airbus at least once? I seem to remember hearing that pilot’s iPhone got wedged behind the joystick and pushed the nose down until he could knock it loose.
The item didn't get knocked loose, it was the plane automation that saved the flight. The auto-pilot self-corrected and levelled off when it detected prolonged dangerous pitch down input[1].
[0] https://www.gov.uk/government/publications/service-inquiry-i... [1] Page 37 of https://assets.publishing.service.gov.uk/government/uploads/...
this makes Airbus the opposite of Boeing