Interesting video by Mark McCandlish, an aerospace illustrator.
I have it set to start showing a sketch of a diamond shaped “craft”:
https://www.youtube.com/watch?v=CsCgYIVRnzA&t=122s
The video bleeps out the last name of a person named Brad. I searched around and found it to be Brad Sorensen.
I watched a much better video about the diamond shaped object last year, but can’t find it now.
The sketch shows a row of holes at the midsection. The other video explained these as discharge nozzles that enabled very high speed. I forget how it was supposed to work.