Some folks riding motorcycles with their smartphones have found that the engines can rattle the cameras. This has led Apple to issue a warning, just as they were also getting ready to talk about their latest iPhones with their latest camera developments. Still, this shouldn’t be a surprise to most people. If you’re on a bike, I suggest one of the shock-mounted variations of things like the GoPro’s or other sports cams, not your $1000 smartphone.
Apple has advised motorcycle-riding iPhone owners that their metal steeds might damage their smartphones after prolonged exposure to engine vibration – but users report total dysfunction after even less frenetic vibrations.