Laurence Olivier had just given an amazing theatrical performance. His friend Roddy McDowall, rushed backstage after the performance to congratulate the esteemed actor. But when he opened the door of the dressing room, he saw the great man seated at his make-up table, head on the table, sobbing.

“Laurence, What in heaven’s name are you crying for? It was a brilliant performance. I’ve never seen you so good.”

“I know,” wailed the actor, “And the bloody thing is I don’t know how I did it, and I know I won’t be able to do it again!“