A Xenon flash will cause the Raspberry Pi 2 to freeze
A xenon tube is a spark gap.If there's anything in this world noisier than a spark gap, I don't know what it is.I think the first radio transmitters were spark gaps.The energy flies thru the air, and is coupled onto the power line.The power supply doesn't cope well with the oscillations, and hiccups.I see the notes about U16 being photosensitive, but if it is a black epoxy like most IC's, I'm not buying that light gets into it.It's possible that blue tack shields the EMP a bit.