David Letterman's sense of humor is so dry that it borders on the acerbic. Letterman's hosting gig at the 67th Academy Awards has become somewhat legendary, a marker by which Oscar hosts now rate themselves. He opened with the infamously unfunny "Oprah, Uma" joke, in which he attempted to introduce Oprah Winfrey and Uma Thurman to each other simply because they both have unique first names. And when politically active couple Susan Sarandon and Tim Robbins walked onstage to present an award, Letterman quipped, "Pay attention, I'm sure they're pissed off about something." Hollywood was unamused. No wonder he's never been asked back.