In a surprise visit, Conan O'Brien stopped by his old studio during the taping of 'Late Night' (Weeknights, 12:37AM ET on NBC). He took a moment to shoot the breeze with Jimmy Fallon, and even had a few kind words for Max -- Actually, he mistook Questlove for Max, but these things happen, right?

Really, he admitted he was there because he'd forgotten to take something with him when he left the studios for greener pastures. "You were here for 16 years," Fallon marveled at one point. "And then what happened?"

O'Brien went straight to the couch and retrieved from behind the pillow Triumph the Insult Comic Dog. "I can't believe you didn't notice that," he said. Does this mean we'll be seeing Triumph soon on 'Conan'?