Jambi is on vacation in Mount Rushmore. At the end of the episode, When Pee-Wee flies over his scooter, We can see Jambi's head in place of Abraham Lincoln.
Originally, Seasons 2, 3 and 4 continued to use the Season 2 intro, until 1991, when the season 4 episodes had it plastered with the Season 5 intro
While flying in a rocket, Pee-Wee says he's "Major Tom". Major Tom is the astronaut from the David Bowie hit "Space Oddity".
Cool Cat says "Dig It" at the end of the Puppet Land song and nobody screams for the secret word being used.
The secret word in this episode is IT, which is said and screamed at nine times.