On Sept 7, 1978, Moonie got up, had something to eat, took a handful of pills, and never woke up. The autopsy showed 26 undissilved tablets in his stomach.
Btw, the night before he died, Keith and his girlfriend Annette went to a movie preview. At the pre-movie party, someone snapped this photo of Keith taking to Kenny Jones.

Of course Keith Moon had no idea that night he was speaking to his replacement.