Originally Posted by sdsearch

...And a passenger could have opened that same bin when the seatbelt sign was off, and the water bottle still could have fallen out. So IMHO the issue of the water bottle falling out had little to do with either the FA or the seatbelt sign (ie, it was a coincidence that it the FA is who did it and it was a coincidence that it happened while the seatbelt sign was on).