This little known force is similar in nature to the famous Cone of Protection (according to which a person standing under power lines enjoys "an invisible cone of protection" from lightning strikes). Its use is based on the concept that "a chaser should (act on) theories of safety whether they are factual or not."
The principle of the Orb is based on air compression, the theory being that by driving really, really fast, air is compressed around the front of a vehicle, thus creating a type of atmospheric force field which repels rain, hail, debris and police radar signals (fig. 1). It has also been suggested that the Orb interferes with satellite-based "Z"-rays which the CIA is using to beam mind control programming directly into my brain.
uh, I digress...
The theory of the Orb was developed by the little known chaser/inventor Johann Donnerkopf whose attempts to prove the theory went awry when his 1923 Model A Ford hit a cow. It has been suggested that the more aerodynamic design of modern vehicles, and the higher speeds attainable by back engineered alien technology, will some day allow Donnerkopf's theory to be proven. Until then, attempts to utilize the Orb of Invulnerability are recommended only to those acting at their own risk.
Now, where is my tin-foil helmet...?