The AAIB report says a sketch of the aerobatics routine and topo map of the area was found in the pilots pocket. It was not inserted in the transparency pocket and anyway the pilot did not carry out the routine that was sketched on it. So what was his intention, was it to surprise everybody a la monty python " and now for something completely different". We will never know as he did not quite finish the first bit because... perhaps the cognitive thing got in the way.