Here is an interesting false proof as to how to multiply $2 \cdot 2$. Taken from this link.
alt text http://img.math-fail.com/wp-content/uploads/joke.png
$\Large\textbf{Another example}$:
Here is an interesting false proof as to how to multiply $2 \cdot 2$. Taken from this link.
alt text http://img.math-fail.com/wp-content/uploads/joke.png
$\Large\textbf{Another example}$: