Happens in sports. Roger Bannister broke the 4-minute mile in 1954. Before this it was thought to be impossible. Within 3 years, 16 other runners also broke the

Happens in sports. Roger Bannister broke the 4-minute mile in 1954. Before this it was thought to be impossible. Within 3 years, 16 other runners also broke the 4-minute barrier. Their equipment was the same as before; it was a mental thing. Arnold Schwarzenegger tells about a similar thing in weightlifting. Pat Casey broke the 500 lbs bench press record in 1956. Bench press records have since doubled, now exceeding 1,000 lbs in some categories.