Actor Christopher Lee served in the British special forces during WWII. While filming The Lord of the Rings: The Return of the King, he was told to scream when his character gets stabbed.  He replied, “Have you any idea what kind of noise happens when somebody’s stabbed in the back? Because I do.” ()

There’s a rare type of blood that’s shared by only 43 people in the entire world. ‘Rhnull’ blood doesn’t contain any of the Rh antigens that 99.9% of humans have. It’s often called ‘golden blood’ because it can be given to anyone who has a rare Rh blood type, but there are only 9 active donors, so it’s only used in extreme circumstances. (, )