Yes, I figured Doohan was probably pulling our collective leg with that “future Scotsman” remark.
No doubt. Although, as someone else pointed out earlier, if he had had done a more authentic Scottish burr we'd probably not have understood half his lines! ;-)
BTW, AED = Automatic External Defibrillator. It is my understanding that Mr. Perrin's voice was recorded for use in the defib devices' audio instructions.