One can say that Elon Musk is good at tweaking numbers, that SpaceX is very optimistic when they say they want to get back both stages from each Falcon 9 launch.

Yet, despite criticism, less than a year after the first (And untethered) flight of the Grasshopper test rocket, the same rocket was able to take off, go sideways 100 metres and come back to land precisely were it took off. That’s impressive, and that’s why SpaceX makes me dream at least as much as the NASA