Rocket Man
It might seem like Elon Musk has only brought all of his outer space talk into our lives recently, but SpaceX was founded back in 2002. So even though it might seem new and somewhat strange to you that Musk is obsessed with outer space, it is the actualization of life-long dreams for him.
And whilst this might be a funny image to some, the look on his face is the look of accomplishment. Imagine working so hard towards something all of your life and then finally getting to a point where you can see your idea come to fruition? He probably makes this face every time he sends a rocket to space.