Hamlin said he clipped the wall with the right rear going 202 mph entering the corner, sending the car down the track. He overcorrected and hit the wall with the right side, destroying the Camry he intended to race Sunday.
Hamlin compared the incident to his 2008 crash at Talladega Superspeedway, where he blew a right front and crashed, although he said he the impact was "way harder than this.'' After that incident, he was kept overnight with what he called a "slight concussion."
Hamlin's last lap before he crashed was 181.409 mph -- his fastest lap of the session. The track qualifying record is 180.856 mph set by Matt Kenseth in October 2005.
Hamlin is third in the Chase standings entering Sunday's Hollywood Casino 400. He's 15 points behind leader Brad Keselowski and seven behind second-place Jimmie Johnson.