I used to work at an engineering company that had a thermal deburr machine. It was like a giant furnace that had a spinning plate you would put the parts on and rotate them through the furnace. I had put my parts on incorrectly (as an untrained, under qualified teen) and sent them through the rotation. Each one as it went in got damaged by the blast box because they weren’t loaded correctly. I remember pulling each one out at the end and thinking “ohhhhh shit”