Corrected entry: Stewie's rendition of Rocket Man is very similar to William Shatner's version at the 1978 Science Fiction Film Awards.
Corrected entry: At the end of the episode, Peter and Chris walk off and leave their guns behind.
Correction: This could very well be symbolic - Peter leaves his rifle behind because he's gotten over the insecurity that drove him to it in the first place, and Chris leaves his behind because he never needed it. Also, remember that we're talking about the two dumbest main characters in the series.
Correction: So similar in fact, that it is the whole reason they had Stewie doing it in the first place. The sequence is a spoof of William Shatner's performance. Pointing out jokes in the show cannot be classed as trivia.