A SpaceX engine test went as planned, but shortly afterward it went south.

Boca Chica, Texas is where one of the SpaceX test facilities is located, and the video below starts just a few seconds after a successful test firing of their SN4 rocketship engine:

After watching a few different videos of the event, it appears (through the comments from the engineers narrating the video) it was probably a cloud of methane that can be seen pouring from the test structure, likely caused by faulty equipment (because if someone pushed a button to make it leak, he's going to be in BIG trouble).

We could find no reports of injuries, except maybe to the pride of some of those engineers. All kidding aside, we're glad no one was injured and I, for one, am thankful for SpaceX's quest for space travel.