Jennifer Garner arrived at the Ed Sullivan Theater in New York on Wednesday, April 29 looking as beautiful as ever. She was there to promote her new movie, "Ghosts of Girlfriends Past" with Matthew McConnaughey. But what started out as an interview, suddenly became a nurturing doctor and patient scene.

If you look closely in the photo, you can see bruises and scrapes Jennifer received to her knee after a fall. When David saw these he immediately turned into a kindler, gentler man, and even applied Neosporin to his injured guest.

You can see the video clip here on CBS: Late Show with David Letterman

Another shot of Jennifer and Matthew a few days prior (April 27, 2009) at Grauman's Chinese theater for the the opening of "Ghosts of Girlfriend's Past" shows her injury free. "Ghosts of Girlfriend's Past"  opens in theaters on May 1st, 2009.