Thanks for posting this. I haven't seen it since my high school physics class fifty years ago, but as soon as I saw the title here in HN I recalled some memora

Thanks for posting this. I haven't seen it since my high school physics class fifty years ago, but as soon as I saw the title here in HN I recalled some memorable details that set it apart from other instructional films of the day --- which I won't mention, because I don't want to spoil it for first-time viewers.