Keaton the Perfectionist

In the Stone Age sequence, the villainous cave man suddenly appears about 30' from Buster. The villain picks up a big rock and throws it at Buster. Buster picks up a club, swings it like a baseball bat, and hits the rock back at the villain and hits him smack in the forehead. A great, great bit that goes by so quickly you might miss it. But, how did they do that? Answer: 70 takes until they got that one.