What the secret behind the crop circle phenomenon?

Before anything else, I must say crop circle formations are very beautifully made. But according to a TV show with a title 'Exposed', crop circles aren't made by any extraterrestrial beings but are made by humans - humans which are very good in circular geometry. In that show [I've seen it 5 years ago], a certain group of people have proven that they could indeed form crop circles within 2 to 3 hours while the farmers are asleep. To do this, they must conduct several geometric planning using the crop lines present in the farms. I dont exactly remember their objectives in doing this but what I could say is that they really are very good at it - using just pieces of wood and measuring tools! They have indeed misled many people!

Crop circles are Chuck Norris' way of telling the world that sometimes corn needs to lie down.

I have already replied to a question like this about Crop Circles before and all I can say is that perhaps they are made by satellites controlled or remotely controlled by humans. Probably some astronauts got bored of staring at the stars and decided to make fun of humans. So they directed the lasers (or whatever gravity-thingy-devices) of their satellites and etched these so called Crop Circles and BOOM! Instant art of fascination. hehe.

they haveshown this on exposed, and there are people who have done such "crop circles" as fast as a few minutes! they have some sort of model and with that, i think crop cirles are more like a "joke"

I believe with what others have said. with the modern technology available around, These crop circles are very easy to do. Like wise, if you have notice , strong winds causes crop to bend and forms into different shapes. So, i think it is not the aliens or extra terrestrial whop di it. It either man made or nature made like the air. Goodluck!