It is believed that if six hundred million people were to jump at the exact same time, the earth would be pushed into a new orbit, and this would stop global warming, extend daytime hours, and create a more homogenous climate.

World Jump Day is July 20th, 2006. Already, 211,419,607 people have agreed to jump. Join us, and together we will push the earth into a new orbit!

http://www.worldjumpday.org/