Pausing in the middle of a cartoon for some commentary by a character or a sign is a favourite Tex Avery routine. We find it in Who Killed Who? (released 1943), Avery’s great spoof of radio/film detective mysteries.
Cadavers fall toward the camera, initially in a 16-drawing cycle, speeding up to eight. We see 13 of them drop before a 14th stops in mid-fall and removes the gag around his mouth. “Ah, yes!” he says to the audience. “Quite a bunch of us, isn’t it?” Then the gag snaps back over his mouth and he resumes his fall (as do nine other identical bodies afterward).
Avery’s name is the only one on the credits.