Burgs: I know of a women who put her new Jaguar through the back of the garage when this happened . . . had the clutch pedal down and started the engine.
The car was fitted with a three-paddle ceramic clutch disc. The disimilar metals between the facings and flywheel bonded, preventing clutch release.
If you're running a cerametalic, iron or any other metal-base disc facings such as a dual-friction disc, corrosion may have bonded your disc to the flywheel or pressure plate, too. However, if you've installed organic facings, check to see if there's any way you can look into the bellhousing while the clutch is operated. If not, you'll need to remove the transmission to check . . . maybe even the complete bellhousing and clutch assembly.
