When Feynman was a very junior scientist in early 1940s, he still had the good fortune of meeting great scientists like Fermi, Max Planck, de Broglie etc as he was also involved in the Los Alamos project(the project to make the Atomic Bomb in the USA). Now once a meeting was going on and The Great Neils Bohr was explaining some hypothesis of his and almost all those renowned scientists were agreeing, suddenly Feynman put some doubt on the theory. Next day Neil Bohr called him up in the morning and said he wanted to have a chat with him. What actually happened was that Bohr wanted somebody to pick holes in his theory--- but since he was a Nobel prize winner(almost everybody else in the room also was), they were influenced by his genius. So Bohr wanted somebody to listen to him without being overawed by him. Anyways many years later Feynman also joined that elite club---- by winning a nobel prize