IMO these pictures were produced on a computer
I am not saying that the person didn't throw a ball at the plane, however, there are some interesting things that I noticed
1. All of the photos with a time stamp show the exact date and time - more like when a watermark is applied when pictures are exported using programs such as Lightroom or Photoshop
2. Looking at the position of the person in the water, I find it impossible to believe that anyone would be able to throw a ball up that high - especially looking at the supposed wave motion during the series of photos
From someone who uses post processing to make minor adjustments to my digital pictures, I know that items can be removed and or replaced on a digital image - my vote is that these are 'fake news'