A teenager from Essex who collapsed at school with a stroke felt ill earlier in the day but thought he had a hangover.
Oliver Lilburn, from Dedham, was at sixth form college in Ipswich when he was taken ill.
Doctors warned his parents that a brain haemorrhage had caused the stroke and that he could die.
Oliver has defied the doctors and now wants to raise awareness about the illness and the fact that it isn't just old people who are at risk.
Click here to find out more about strokes and the work of the charity Different Strokes.