The man opened a safety gate and stepped onto the track of the roller coaster called the Wacky Worm at 2:20 p.m. - less than 90 minutes into the opening day of the fair, said Vicki DeArmon, the fair's marketing director.
The man, who was in his 20s and was not the operator of the ride, was hospitalized, and his condition was unknown.
A picture of the roller coaster can be seen below:
News Source: http://articles.sfgate.com/2010-06-24/b ... de-coaster