James Corden is still in the very first baby steps of his venture into late night televsion with "The Late Late Show." 

Last night it seemed to all come falling down when Katie Couric took a tumble down a flight of stairs as she was entering the set.

The music stopped and people gasped, and Corden appeared to be freaking out. That was until Couric revealed it was all an April Fools' Day prank.

Who knew Couric had it in her?