Helium. It’s not a gas you probably pay much attention to, unless you work in a handful of very specific industries, enjoy playing with insane overclocking rigs, or have a job filling party balloons.
But helium is critical in the cryogenics industry, which means it’s used in hospital MRI scanners to keep the superconducting magnets operating at the necessary temperature.
You can check out the video for the full story but the basic idea is that a hospital installed a new MRI machine that used helium and it crashed a lot of peoples iPhones, but curiously no Android phones seemed to be effected.
You can see iFixit test out an iPhone in helium in the video and watch it crash for yourself.