In the closing credits of "Where No Fan Has Gone Before" (Futurama Season 4, Episode 11) we are shown a collection of stills that appeared in the show, to the sound of a variant of the Star Trek theme. The last still is this one of Kif Kroker, which breaks the trend:
Kif did appear in the episode during the inquiry / trial conducted by Zap Brannigan, but nowhere in the episode did he appear like that.
Was it a shout out to the puppet used by Balok1 to intimidate others?
If not that (and I'm not convinced it was), then what is the relevance of that portrayal of Kif?
1Balok's puppet appeared in "The Corbomite Maneuver" (Season 1, Episode 10) of the original Star Trek.