In Houston, a bowler was denied a perfect score of 300 when the metal rack came down and blocked his ball just as it was about to collide with the pins. The American had to settle for a disappointing 297 as a result.
All this bowling talk has reminded us of Homer Simpson's successful attempt at a 'Perfect Game', despite Lennie's best efforts.
http://www.youtube.com/watch?v=U7EeE7zRo4w