An Irishman wearing nothing but Wellingtons goes up to the top of a block of flats and jumps off. The Police and some eyewitnesses are standing round the body talking when a Policeman says, "It looked as though he committed suicide then. He went up to the top and just jumped."
Then one of the dead mans friends came up to the little group and said, "He did not commit suicide. He thought he could fly."
"But he had no wings," said the Policeman, "He was just wearing Wellingtons."
"I know," replied the dead mans friend, "Someone told him earlier this morning that his grandfather flew in Wellingtons during the Second World War."