"The Consumers" by Stompin' Tom Connors

Seemed appropriate to the season...many thanks to capt_facepalm for the link!

"The consumers, they call us
Running in the race
Buyin' up the bargains
In the ol' marketplace
Another sale on something
We'll buy it while it's hot

And save a lot of money
Spending money we don't got!"

Same shade of grey? :)

These two blocks are the same shade of gray. Don’t believe me? Use your finger to cover the line and the shading in the middle and see for yourself!

Phil Plait gives an explanation of how are brains can be fooled by optical illusions here: http://slate.me/IG3zab