An Icelandic rally co-driver became seriously car sick in the middle of a competition at the end last July. After around 15 minutes of driving the co-driver began to vomit all over himself followed by a nosebleed. He tried to navigate the driver the best he could in-between vomits.
The co-driver handled this quite well and at the end of the tour he asked the driver "How is the smell?".
See a YouTube video of the incident here below: