At the Anthropology students' first meeting with the Amazon natives, Maynard tries to escape his fear by putting a bucket on his head in a close shot of himself, Dobie and Clydene. The camera cuts to a long shot, in which he isn't 'wearing' the bucket, then quickly back to the close shot, in which the bucket is again on his head.
Alligators are not native to the Amazon basin, in which most of the episode is set. But there are repeated dialogue references to alligators living there, as well as footage of alligators.
When Dobie gets out of the natives' soup pot, he isn't wet.
Maynard asks Dobie to kiss his sneakers, but they're not on his feet; the audience has been shown that the native chief is wearing them.