Comment Re:C64 had a cassette drive (Score 1) 74
Actually, that was the point where you should hit Shift+Run/Stop, which would abort the tape load you might have inadvertently started.
Second thing to try was Run/Stop+Restore (and you had to hit Restore hard because it was designed to prevent accidental closure), to warm-reset the machine.
Then you restart.
. . . Unless, that is, you had one of the defective machines (there were, admittedly, a hell of a lot of them -- I went through 6 before I found one that worked worth a damn), the first step above should have gotten you out of that.