The Umbrella Man was not signalling Jack Ruby to start unloading ammunition from back of the Grassy Knoll. He was protesting John Kennedy’s father’s promotion of Neville Chamberlain’s appeasement policy of 25 years previous, a black umbrella being one of the Prime Minister’s signature symbols. The 22nd of November 1963 was a bright sunny day in Dallas: no raincoats, no umbrellas. By turning the umbrella upsidedown he could have caught pennies from Heaven. With supernatural powers, he could have risen through the air like Mary Poppins. The motorcade sped up, in no time to notice René Magritte by the roadsign.