Dr. Seuss on the Loose (1973)

One of the sneetches gets kicked.

"stupid" is heard a few times

In the Star Off Machine sequence, we see an extremely close up shot of the Sneetch's eyes in the dark, breaking the fourth wall. This also happens in the unedited shots that were included in the BFA airing and can be found in the 2003 VHS/DVD re-releases afterwards.

Similarly, in the Green Eggs and Ham segment, after the train enters the tunnel, we see a shot of two eyes of both Sam-I-Am and Guy-Am-I in the dark, breaking the fourth at about 14 seconds.