We bet host James Corden's heart nearly stopped when he saw his Late Late Show guest Katie Couric take a nasty tumble down the stairs!
But it turns out, it wasn't Katie at all! The Yahoo News Global Anchor pranked the 36-year-old for April Fools' Day by having a stunt double take part in the scary fall.
James later revealed the gag terrified him. "I was like, 'Oh my God. Katie Couric just died.'" Shout-out to the woman who tried to stop her from rolling!
Watch the hilarity below:
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