When shooting the scenes in the meat-locker where he punches the slabs of beef, actor Sylvester Stallone punched the meat so hard for so long that he flattened out his knuckles. To this day, when he makes a fist, his knuckles are completely level. 
When shooting the scenes in the meat-locker where he punches the slabs of beef, actor Sylvester Stallone punched the meat so hard for so long that he flattened out his knuckles. To this day, when he makes a fist, his knuckles are completely level.