Hello, this is my first post, i only have what we call an O Level Physics here in the UK, but i have a strong layperson's interest in the subject, so i'm looking forward to picking the brains of the more educated people here. My friend's professor showed him something very interesting, all to do with a plasma beer jug and a strong magnet. The professor showed the student that, when he held a very large and strong (probably four inches long and most of an inch in diameter, judging by the scale in the video) Neodymium magnet above the jug, the plasma started spinning. My question is, does the plasma spin because the magnetic field is spinning, or is it due to some interaction between the magnet and the charged base plate ? Here are two videos showing the effect (there is a third in slow motion but i can't find it right now) : All the best, Gary.