It was in 1880 that the sport really began to take shape, thanks almost exclusively to one person. was a student at Yale from and an avid athlete, playing on Yale's football team until 1882. Even after he left Yale as a student, he continued to coach the team and be a regular presence at every rules convention held until his death. a
Tom Brady
b
Irving Reid
c
Walter Camp
d
Mitty Scott

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me