It's live WTF from The Steve Allen Theater in Los Angeles. Ari Shaffir explains his deep abiding love for the Ultimate Fighting Championship. Pete Holmes tries to make sense of Marc's open hostility toward him. The Office's Craig Robinson reveals his favorite use of Twitter. Plus, Jim Earl remembers the dearly departed and Eddie Pepitone lashes out. This episode is sponsored by Pro Flowers. Click here and use the code WTF for a special Mother's Day offer.