Here's a video of Elon Musk watching the Falcon Heavy take off

This past week, as we watched SpaceX launch its absolutely massive Falcon Heavy rocket for the first time, many of us wondered if it would make it off the launch pad. So did Elon Musk. National Geographic just posted some incredible behind-the-scenes footage of the launch, capturing everything from about 15 seconds prior to takeoff to his moment of realization that the mission was a huge success.