By Jennifer Maas
Updated April 01, 2015 at 12:00 PM EDT
Credit: CBS

Late-night talk show hosts are known to pull pranks on their guests every now and then, but Katie Couric turned the tables on the Late Late Show host James Corden on Wednesday, by scaring him into thinking she had fallen down a flight of stairs.

The April Fools’ prank was all in good fun, but clearly terrified Corden as he saw a stunt double—who he thought was Couric—make her entrance and immediately tumble down the set’s staircase.

Let’s just say it definitely fooled him.

“That’s like our worst nightmare, that is so funny, that was an amazing prank,” Corden said. “I was like, ‘Oh, my God. Katie Couric, she’s died.”

The Late Late Show

  • TV Show
  • In Season