Heironymus sent me this one.

An uninformed voter was walking by the local mental hospital one day and he heard the patients shouting, “13! 13! 13! 13!”

The fence was too high to see over, but he saw a little gap in the planks so he looked through to see what was going on. When he did, one of the patients poked him in the eye with a stick and all of the patients then started shouting, “14! 14! 14! 14!”