As Elon Musk returns his focus to his businesses, one of his most important companies just had another setback: A SpaceX Starship rocket exploded in an immense fireball Wednesday during a routine ground test.

Although the SpaceX Dragon and its Falcon 9 rocket have proven to be a reliable spacecraft, and somewhat crucial to the ferrying of American astronauts to and from space, Elon Musk's other, more ambitious spacecraft,

The SpaceX owner seemed to joke about the failed test, writing, “Just a Scratch” after his rocket went up in flames.