Reading it two ways.

When we read a newspaper, novels, jokes, or any type of text or senteces, we can find different meanings or points of views that the author may want to give to his text/sentences. But why do author do that? Maybe to create a good and concentrated reading, to generate a ironic situation or joke. Ambiguity is always around us, can be to create hilarous situations, in philosophical treatises, legal documents, etc. But sometimes is difficult to recognize the 2 meanings that for example a sentence may have.
Here are some examples of ambiguity:

• Slow children at play
• Toilet out of order. Please use floor below.
• Quarter of a million of Chinese live on water.
• "I once shot an elephant in my pajamas".