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).......

Today, December 5th, is the 4th annual International Day of the Ninja. While we don't recommend taking swords to work, come nightfall, you can let out your inner ninjutsu at the El Rey Theater on Wilshire. Kent Nichols and Douglas Sarine of Ask a Ninja will host. The Ninja awaits your questions, so don't be talkin' like a pirate. Get there early for special guest performances from funnyman Patton Oswalt and the hilarious audio-visual offerings......