Check these out when you have a minute.

http://www.listverse.com/miscellaneous/20-amazing-optical-illusions/

Trying to get without first giving is as fruitless as trying to reap without having first sown.

It does not do to leap a 20 ft chasm in two ten foot jumps.

Proven fact - some of these illusions work differently when you've has a scotch and soda.

Trying to get without first giving is as fruitless as trying to reap without having first sown.

It does not do to leap a 20 ft chasm in two ten foot jumps.