The final verse of "One Vision". Just as you think it's certainly a song about union of the people, Freddie Mercury tacks in "just gimme, gimme, gimme, gimme fried chicken!" The last line was the suggestion of Freddie's boyfriend, Jim Hutton, who encouraged Freddie to Throw It In, suggesting that he was "big enough" to get away with it.
Freddie ate fried chicken for lunch on the day they recorded the lead vocal, hence the joke.
The music video for "I Want To Break Free". That is all. In fact, David Mallet, the director, swears that he must have broken something in his body from laughing so hard.
In case you're wondering why: Freddy Mercury in drag. And yes, this was after he grew that mustache. Topped off by him winking at the camera. Then you have the other members of the band in drag, all parodying Coronation Street.
The whole song "Don't Try Suicide" seems like a bit of dark humor on Freddie Mercury's part; it comes off as a finger snapping show-tune-esque ditty about how the subject shouldn't attempt suicide because "Nobody gives a damn". Highlights include "Baby, when you do it, all you do is get on my tits."