Roger completely forgot the words to 'I'm In Love With My Car' and after an "instrumental part" Freddie realized Roger's blackout and had to sing a couple of lines to help him.
Line-up
Freddie Mercury (lead vocals, piano, tambourine, acoustic guitar),
Brian May (electric guitar, backing vocals, acoustic guitar, piano),
Roger Taylor (drums, lead vocals, backing vocals, timpani, tambourine),
John Deacon (bass guitar)