1 vs 1 at about 1000 this morning, over the top of the flight path of NWI 27 end and seriously having a good bash at each other. Had the fortunate experience of handling them at Cott VASS many years ago so was watching them with the next door neighbour explaining what a beast they are. One did end up sitting on his tail with burners on and all energy to manoeuvre swiftly gone. Never seen that before. Enjoyable to see them as I will be moving soon and will not see any fast air where I am going.