An IT admin at Morris Hospital near Chicago started receiving complaints that dozens of staff iPads, iPhones, and Apple Watches suddenly stopped working. One explanation was the installation of a new Magnetic Resonance Imaging (MRI) scanner. MRI machines use the gas (He) in liquid form to super-cool the superconductive magnetic coils that become extremely hot when the machine is used. Helium can do nasty things to tiny MEMS (microelectromechanical systems) sensors used in mobile devices to enable motion-sensing gyroscopes. iFixit tested an iPhone 8 in the presence of helium found that it shut off within minutes.”]