Magnetism Magnifier

Dr. Doofenshmirtz plans to halt the rotation of the Earth by using tin foil, a giant magnet and a "Magnetism Magnifier" that he invented.

Inception, Purpose and Goals to be Achieved
Dr. Doofenshmirtz decides that he will halt the Earth's rotation and will do so by inventing a "Magnetism Magnifier" that will attract tin foil. He then purchases 80% of the country's tin foil.

He does not plan far enough ahead to work out what he would gain by doing halting the Earth's rotation. However, he considers purchasing "a bunch of east-facing real estate and [selling] it again with a nice sunset view" as a means of recouping his costs for the tin foil.

Implementation
Prior to Agent P's arrival at Doofenshmirtz Evil Incorporated and subsequent capture, Dr. Doofenshmirtz covers the buildings on the eastern seaboard with the tin foil he's purchased. He opens the retractable roof of the building and raises the Magnetism Magnifier in front of the magnet, boasting of the "unimaginable electromagnetic forces" at work.

Design flaws
The tin foil is considerably less sturdy than the buildings it covers. The magnetic field from the Magnifier lifts the tin foil off of the buildings, compressing it into a two-ton ball as it is drawn back towards the Doofenshmirtz Evil Incorporated building at a speed of 200 mph.

Realizing what is about to happen, Dr. Doofenshmirtz implores Agent P to help him separate the magnet from the Magnifier, forgetting that he could lower it away from the magnet again. The two are unable to separate them.

Aftermath
Agent P fires a grapling hook at a passing helicopter and ties the end of the rope to the magnet. The helicopter lifts the magnet and Dr. Doofenshmirtz thanks Agent P for saving them. A moment later, the ball of tin foil crashes through the top of the building, carrying Dr. Doofenshmirtz along with it.

The Magnetism Magnifier is flung into the air, where it latches onto the magnet and begins working again. The helicopter passes over the Coolest Coaster Ever and the coaster is lifted by the Magnifier, tearing it off of its foundations. He then drops onto the coaster, landing safely in one of the cars and quickly resumes his Perry the Platypus persona.

To prevent further strain on the helicopter's engine, Agent P cuts the rope attached to the Magnifier, causing the coaster to come crashing to the ground in a different area of downtown Danville.

No records are available to indicate what became of the Magnetism Magnifier. The ball of tin foil was last seen rolling off into the distance about a mile from the Flynn-Fletcher household.

Background Information
Another factor not considered by Dr. Doofenshmirtz is the effect that halting the Earth's rotation would have on objects on its surface. The Earth rotates at approximately 1,000 mph, and if it stopped rotating suddenly, objects on the surface would be flung eastward at that speed. This speed is not sufficient to overcome the effects of gravity, so people and objects would not be flung into space.