This is Charlie's ingenious re-fuelling system for his jet.
Later on I tried to take some airborne video from the jet. Nothing came out. I must have pushed the buttons in the wrong order.

I didn't have much luck with airborne video today. It may have been the heat affecting he camera. But quite by accident I did get a view of an aerotow -- You can just make it out in this clip. The glider is flying in the low-tow position.