Kyle Busch hits a bump in the road

  

  
Kyle Busch will have to put on quite a show in Sunday's 427, because he'll be starting from the rear, after changing engines (Photo: Getty Images for NASCAR)

   By Mike Mulhern
   mikemulhern.net

   LAS VEGAS
   Kyle Busch's weekend got off to an unlucky start Friday when he blew an engine in Shelby 427 practice and had to change engines.
  And Sam Hornish Jr. took a hard lick later in warmups for afternoon pole runs when he slapped the fourth turn wall.
  

  
Good thing crew chief Steve Addington carries extra engines in Kyle Busch's hauler (Photo: Getty Images for NASCAR)