Denzel Washington Proves He's 'Unstoppable,' Does His Own Stunts (VIDEO)

In 'Unstoppable,' 55-year-old Denzel Washington joins a growing list of actors who have done their own stunts. Washington said he decided to risk life and limb in order to bring a sense of authenticity to the movie. One stunt required him to run on top of a train barreling down a track at breakneck speed, he said on 'The Early Show' (weekdays, 7AM ET on CBS).

"I am running on top of a train going 50 miles an hour. I'm stupid to do it, but I did it," said Washington. "I think audiences know when it's green screen or CGI and it's not. That's me up there."