I would guess that the picture was not properly secured if a picture fell off the wall.
The force that holds a picture on a wall is the force of friction between the back of the picture frame and the wall. This friction prevents the picture from sliding or falling off the wall.
Is there a picture of a man falling off Hoover Dam during construction and he is waving?
yes
It most likely means that the picture was not properly secured to the wall.
In some cultures, it is believed that a clock falling off the wall is an omen of bad luck or impending death. This superstition likely stems from the association of time with mortality and the idea that a falling clock signifies the end of someone's time.
Not all naturally occurring phenomenon can or should be interpreted as a sign or omen. Unless the picture was of someone specific and of significance to you personally I would not take it too seriously. That said there is a superstition that says a picture falling from the wall, for no apparent reason is the omen of an imminent death, however, the glass in the picture must shatter for the omen to be believed as true.
Not all naturally occurring phenomenon can or should be interpreted as signs or omens. That said, a weddingphoto falling from the wall, when no mundane explanation can be found, could be read as meaning the marriage is in for a rough spell, particularly if the glass breaks.
nothing it means nothing
You need better picture hangers.
No it is not. Some things just fall.
a picture on a big peice of paper that goes on your wall. You can actually make wall posters off your own photographs. posterhead makes them.. www.posterhead.com
What does it mean when pictures fall off the wall