If you look from above the ball and surface, the view you have is of the ball moving sidewise.
From the al.com
For two decades, his career movements were crablike, sidewise.
From the time.com
We shot the flare a second time, more sidewise and lower.
From the charlotteobserver.com
While the stock market has been drifting sidewise, another exchange has been moving at a furious pace.
From the time.com
The frequent sidewise glances at Lintu and concertmaster Eric Halen underscored the performance's collaborative spirit.
From the chron.com
Often worlds that are similar to each other are considered closer to each other in terms of this sidewise travel.
From the en.wikipedia.org
Antz may have amused viewers with its sidewise wit, but as a comprehensive vision of computerized moviemaking, Pixar's dream works.
From the time.com
As a swept-wing aircraft slows toward the stall speed of the wing, the angle of the leading edge forces some of the airflow sidewise, toward the wing tip.
From the en.wikipedia.org
His shoulders would sag with boredom at a question, his head would sink down and sidewise and he would begin a soft singsong response to a hostile inquiry, radiating contempt.
From the time.com
More examples
Sideways: toward one side; "the car slipped sideways into the ditch"; "leaning sideways"; "a figure moving sidewise in the shadows"