I was watching this video on youtube called will it blend where they supposedly blended neodymium magnets into powder. I saw sparks coming from the process of it being powdered but I have read elsewhere that trying to file neodymium magnets is dangerous as it would be explosive. I am not sure whether it truly is explosive or if the video is fake/didn't use real neodymium magnets. Which is right? I have neodymium magnets and I know they do easily chip if allowed to come together at a fast rate, but I am not sure whether it is a danger or isn't.