YouTube: The pushblock was used because it allowed me to pivot the piece into the blade to create the kickback while pulling my hand away from the blade. We tested several other handle types and all pulled my hand towards the blade when the kickback happened.
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This is terrifying. At my high school, the wood shop teacher hated using the blade guard on the table saw because he said it just got in the way. When I went back this past winter to help build some scenery, I had found that he had gone as far to hide the blade guard to prevent people from putting it back. This is absolute proof that he is incredibly dumb to do this!! I have been lucky enough to have only experienced kickback when working with larger pieces of sheet goods, long before I had been trained on the table saw here, and I had thought that I had experienced kickback because of the size of the pieces of wood I was trying to rip down and the lack of help I had trying to do so. Now I see that kickback can happen on any size of wood, and while it is important that you are moving the piece of wood through the table at the right alignment and speed (which on a larger piece of wood could be improved by having another person assist), it is even more important to have a riving knife and/or blade guard attachment on the blade to ensure that the alignment stays the right way.
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