This sign warns of an unpredictable gate that is “able to be moved without prior warning.” If you don’t pay enough attention, it might actually kill you.
The pictogram manages to be grisly and funny at the same time. I don’t get it though: if the arrow represents the force of the gate, what’s that black bar that the figure is being squashed against?
Fortunately, I managed to take this picture and lived to tell the tale.
TORONTO TYPE 
October 13, 2010 at 3:16 pm
I think the arrow represents the gate and the black bar is the gate post. Hey, at least it’s not a portcullis. ( http://tinyurl.com/2fb5qlp )
October 14, 2010 at 11:00 pm
Haha! Thanks David, you’ve put me in the right frame of mind for Halloween!