Premier Date: October 3, 2003
A properly-working cell phone poses almost no danger of igniting gasoline, even when surrounded by gasoline vapor with the optimum fuel-air mix for ignition. The actual risk comes from an electrostatic discharge between a charged driver and the car, often a result of continually getting into and out of the vehicle.
(This myth was revisited in episode 14 and it was busted again.)
The implants are extremely flexible.
(A spin-off of this myth involving an inflatable brassiere was tested in episode 14 with the same result.)
It was proven that a high rotation (in excess of 8,000 RPMs) could shatter the CDs, but the MythBusters could not achieve this using an average CD-ROM drive. Existing physical damage to the CD made shattering more likely.