IN the upper picture, an offensive sweep around the left flank of the defense is well under way, with three interferers ahead of the runner. One is in contract with defensive player (1), another appears to have the advantage of player (2), while a third is aiming intently for player (3) and player (4) is not abreast of the runner. It would, therefore, appear as if the offense were on the threshold of a good gain.

(b)

HOWEVER, the lower picture of the same play, taken less than "two steps" later, shows a decided change of compleaxion. To be sure the runner has advanced a whole yard, but player (1) maltreated the interferer (now stretched on the ground) who was menacing him. Player (2), by using his hands on the body and head of his opponent, is now free from him. Player (3) has wisely kept on the outside of the runner and although he is about to receive the full shock of an interferer, he caused the runner to turn in, where he was met by player (2), the very man who a second ago appeared to be out of the play. No doubt player (4) would have tackled the runner, but then again he might not.

Centre College vs. Harvard 1920.