Essen, I agree, the BUP blows the doors off a KA for kneading. My point was that the same sliding action, without kneading, can happen under certain conditions, in the video, it may have been the oil, in other cases it can happen if the dough has too much flour on the bottom. Ever mixer has it quirks. I love it when you watch the old Julia Child show and they use a lift bowl KA, the guest usually explains you need to start it on low and pulse a few times before letting it run, because otherwise everything in the bowl goes airborne - not an issue for the BUP.