Of course he did. President Obama just had to make one last dad joke before leaving office. We're sure Malia and Sasha are thrilled. In response to a tweet by NASA's Mars-exploring Curiosity rover, which showed a photo of a document with the president's signature on the surface of the red planet, POTUS tweeted the most "Ugh, DAD!" thing ever. "That is out of this world. Thanks, @NASA," he wrote. It's very hard to top "Yes we cran," but at least he tried. And while we'll miss his well-meaning corniness, at least we can always look back at his greatest hits — like all those turkey-pardon videos. Actually, who knows? We still have seven days to go. Surprise us, POTUS — we could use a laugh.