Ryanair's brand image nosedived after cancellation crisis, according to a new Core Media study.

Their relations nosedived after a militant attack on the Indian city of Mumbai in November 2008.

Relations between India and Pakistan, which have fought three wars since independence in 1947, nosedived after the assault and have not fully recovered.

Ties between the two neighbours nosedived after last November's Mumbai attacks, in which 166 people were killed and New Delhi blamed Pakistan-based militants.

Relations between the two nosedived after deadly attacks on Mumbai in 2008, which India has always blamed on Pakistan-based militants, and have not fully recovered.

Birmingham City's hopes of avoiding relegation nosedived after two-goal Czech striker Milan Baros led Aston Villa to a 3-1 victory over their city rivals.

Avandia sales fell 38 percent to 225 million pounds as demand nosedived after it was linked to heart-attack risk in a U.S. study in May.