Man in Critical Condition After Being Knocked Out By Ninja

A 20-year-old man remains hospitalized in critical condition after being struck by a roller coaster at Six Flags Magic Mountain in Valencia on Saturday. The man lost his hat on a ride and climbed two security fences to retrieve it, according to park officials. He was then struck by the Ninja roller coaster and knocked unconscious. Ninja remains shut down pending an investigation. (Photo via MPR529's flickr).