Reverse Swing
Once the ball becomes older and more worn, it will begin to move in the opposite direction to where it would usually swing with no great change in the bowling grip.
For example, an outswinger's grip will move into the Right handed batsman in the air while an inswinger will move away from the bat. All this tends to happen very late on in the delivery, making it difficult for the batsman to judge the changes in the air. Not every single bowler can obtain reverse swing - the ball needs to be propelled above 80 mph or thereabouts to make it move in the air.
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Famous quotes containing the words reverse and/or swing:
“They shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more.”
—Bible: Hebrew Isaiah, 2:4.
The words reappear in Micah 4:3, and the reverse injunction is made in Joel 3:10 (”Beat your plowshares into swords ...”)
“A just thinker will allow full swing to his skepticism. I dip my pen in the blackest ink, because I am not afraid of falling into my inkpot.”
—Ralph Waldo Emerson (1803–1882)