The next day shocked doctors diagnosed her with a ruptured throat and
ordered her to rest it completely to allow it to heal.
The bizarre injury is the first known vuvuzela-related accident since the
World Cup kicked off last week.
Yvonne, from Cape Town, said: 'I had never blown a vuvuzela before but was
given one at work and was going to watch the first South Africa match so
thought I'd take it along.
'I was walking towards the Fan Park in Cape Town and blowing it as hard as I
could when suddenly my throat started to hurt.
'At first I thought I'd gone down with a bug but the next day it was worse.
'When I went to the doctor he took a look and then laughed.