A Raptor 3 engine experienced a RUD on the Raptor Vertical test stand at SpaceX's McGregor test site. NSF - NASASpaceflight.com

And that's why they test, and how it works per how the Raptor 2's have been flying with Starship on recent flights. Obvious, but important context as there are some folks who latch on to anything like this with bad motives.

@NASASpaceflight Good. Learn learn learn and squash out all the gremlins before flights. 💪

@NASASpaceflight This is the best possible outcome in the early dev phase. It is another failure point that will be addressed, although this was most likely a push-to-the-limits test.

@NASASpaceflight Welp, they found the limit.

@NASASpaceflight This was the 132nd test (give or take a few) of a Raptor 3 that we've seen, so they got quite a few under their belt before their first (visible) RUD!

@NASASpaceflight SpaceX engineers testing Raptor 3 with antimatter instead of CH4.

@NASASpaceflight lmao raptoer 3 is garbeige SpaceX will never get starship to orbit this program is a failure

@NASASpaceflight Now it's difficult to think about ship 33 using them

@NASASpaceflight Interesting, right after the RUD, the fuel surge from fuel shutoff gets flared off in the stack off in the distance.

@NASASpaceflight Damn big boom