I must have got my height estimate wrong. He was a couple of miles away. All I can say is that as he pulled out of the loop, going from 9 o' clock to 8 o' clock to 7 o' clock, he then disappeared behind the trees. I was waiting for a column of smoke before dialing 999. But he didn't re-appear. He may have done a steep turn at around 0 feet and motored to another part of his area. This frightened me plenty until he re-appeared elsewhere.
He was good. He had panache. Only loops. No cuban eights, stall turns, barrel or slow rolls which made me think that this was not a regular display.
I've looked at the Twister on google. It could have been one except he had two cannons halfway along the leading edges. They may have been a "faux" add-on. Phenomenal vertical rate of climb and a deep throaty engine sound.