The red team are on defence and are forcing backhand (the same rules would apply concerning how you move if the force were forehand only change being where the breaks will be going)
Player one's force is too weak and an io backhand is thrown to player 5
Player 5 knows he can't block the throw so positions himself to prevent the breaks from chaining by moving laterally first
He is now in the flat forehand lane and can move in to pressure the thrower and stall him
Obviously if he could get a block because the throw is sketchy or the distance between him and his mark is small then he may decide to go for the block-at any rate the play is reset
The reason that the defender moves like this is because it prevents the easy instant break from happening-in this situation we will show what happens if the defender moves along his natural trajectory
Player 1 lets us down again by letting out a forehand basic break to 5 again
Player 5 does not adapt his movement and stays on a diagonal
Player 5 instantly goes for the forehand break before the defender can get the force on properly as he is not in the land to pressure it
Player 7 gets the disc and his defender is unable to get anything on it to stop him because he is on the open side of his man (the correct side)
It is also key that after moving laterally people move in-this example will show why
Red 1 is again failing at the whole forcing thing-player 5 is going break again
Red 5 drifts across as he should
However he then stays there thinking his job is done...
This allows player 5 to either get a backhand break to player 6
Or...
A big roll forehand break to player 7 (imagine that it rolls more then I have managed to make the animation show)