It seemed like a relatively straight forward sequence when it was explained in the video and you’d wonder how you could make a mistake, however in some of their videos online they were conducted a lot faster than I personally envisioned. You’d need to see the actual video to get a true understanding.
I’m guessing that the extent of the damage indicates a collision at a high speed of convergence as otherwise you’d think it would simply brush off the other aircraft. It really has torn a hell of a hole in the wing.