Actor James Woods says he's happy to be alive after he was involved in a seven-car crash on an icy highway in Colorado.

The accident happened Monday on Interstate 70 in Glenwood Canyon. In a series of tweets, Woods said another person driving over 75 mph spun out and that he hit a wall along the highway to avoid that driver. Woods said that after hitting the wall on the other side of the road he slid backward going 60 mph. He said a guardrail kept his Jeep Grand Cherokee from dropping 100 feet to the Colorado River below.

Woods praised the police, firefighters, tow truck drivers and everyone else who helped him. 

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He also apologized for rambling and said he had a "little concussion." On Tuesday, he said he was back on the road again.

The Associated Press contributed to this report.