It all starts with the goal keeper clearing the ball.
The team in blue are defending - or trying too. Ball goes over the defender's head.
Goalkeeper's non save
Blue defender, can he save off the line?
The above sequence does not capture the ineptitude, you have to see the video clip
to appreciate the bad defending:
N.B. With some browsers you need to click twice on the Play arrow 
to start the video.
N.B. Help for Mozilla browsers Football - bad defending (Right click, Save Target As)