An Amtrak train headed to West Virginia, carrying Republican members of Congress to a retreat, was involved in a crash with a truck on Wednesday.
Rep. Chuck Fleischmann tweeted that he was not injured, and was working with doctors on the scene.
However, he was standing during the wreck and fell backwards.
There was one confirmed fatality, but no members of Congress were seriously injured.
It was the third frightening incident for Rep. Fleischmann.
He was on the London Underground when it was bombed in 2005.
He was at a charity Congressional baseball practice outside Washington last June when a man began shooting.