During a recent test, a rocket engine exploded, joining a series of blasts at the company.

When the engine has started to eat into its copper sections, there is a green flash of light that occurs.

This type of explosion, known in the spaceflight world as an RUD, is fairly common for the company as it throws things at the wall and see what sticks.

Paul RUD

There have been many similar explosions over the years that have become a sort of calling card for Musk.

After this past July's explosion, which did not destroy the Booster 7 prototype intended to push the company's Starship into space, Musk appeared to suggest that the blast wasn't scheduled at all.

In reply to NASASpaceFlight's Chris Bergin, the now-Twitter owner said, "Actually not good."

Money Talks

It doesn't mean that explosions aren't expensive as all get out.

The company lost hundreds of millions of dollars when one of its satellites blew up after liftoff. There was an explosion of an early Crew Dragon module before it had sent any astronauts to space.

It's better for explosions to happen during test firings than it is during actual launches. Even when they explode at a bad time, Musk insists that the data the company collects is worth it to do a better job next time.

A passenger jet flies over the launch pad as a rocket takes off.