Spiraling footballs wobble at one of two specific frequencies
The wobbling is also why football passes drift sideways
![A child throwing a toy football to an older man standing in the driveway of a suburban neighborhood](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/08/081122_no_football-physics_feat.jpg?fit=1030%2C580&ssl=1)
When a football flies through the air, it tends to visibly wobble at one of two frequencies. The wobble may cause the pass to veer left or right by as much as a few meters.
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