In a body of water near a tattoo parlor
There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it. If you are not allowed to move in any way (other than your eyes).
Where can you place an apple so that all but one person can see it?
In a morning bowl, it's me you drown. In a certain season coming down. I may silently fall from your crown. Which may evoke an observer's frown. What am I?