That report was astounding to me and reinforces the need to carefully study the laws and common practices of another country before flying there. That sort of thing is simply not done in the US, outside of restricted airspace or on designated Military Training Routes (MTRs). A 210KT Hercules @250 AGL would be something to behold
I had one opposite direction on an IFR flight with minimum separation once. We were in and out of the crud, and here he is at about half mile, and closing speed of 420 knots or so.