It happens in an instant, an overwhelming terror, cold sweats, a racing pulse, dry mouth.
To the outsider, a phobia may seem totally irrational, but to the people who have to live with them they are all too real and totally debilitating.
Millions of Australians have at least one phobia. It could be a fear of spiders, a fear of the dentist or even a fear of something as seemingly harmless as a bird.
But now there’s a high tech treatment inspired by - of all things - video games, that could help victims of phobias conquer their fears.
This Sunday at 8.10pm, join Matt Doran as he attempts to overcome his arachnophobia, a fear of spiders he’s had since childhood.