While sufferers can keep faints at bay by avoiding dangerous movements - such as standing up too quickly - and consuming enough salt and fluid, some doctors recommend exercises that patients can carry out if they feel a faint coming on.

BBC: Feeling faint? Cross your legs

The crowd's initial silence quickly gave its place to a standing ovation, prompting Senegalese singer Youssou N'Dour to storm up on stage and congratulate him.

CNN: Somali rapper K'naan makes songs in the key of love